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Archive for the ‘Paternity Testing’ Category

Different Types Of Twins?

posted by admin @ 2:58 PM
Thursday, September 22, 2011

Most people don’t relies that there are many different types of twins in the world. Not only can you be identical or fraternal twins but you might be one of any number of other type.  Below are some of the most common other types of twin.

2. Twins Conceived Separately: Superfetation
Normally when an egg is fertilized, a woman’s cycle is interrupted and ovulation ceases. Rarely, however, an egg can be released while a woman is already pregnant, resulting in twins that are conceived at different times.
More: Superfation
3. Twins with Different Fathers: Heteropaternal Superfecundation
Fraternal (dizygotic) twins are the result of hyperovulation, the release of multiple eggs in a single cycle. Superfecundation describes a situation where the eggs are fertilized by sperm from separate incidences of sexual intercourse. In a case where a woman has sex with different partners, the twins could have different fathers and the apporpriate term is heteropaternal superfecundation.
More: Heteropaternal Superfecundation
4. “Half Identical” Twins: Polar Body Twins
There are two types of twins, right? Dizygotic (fraternal) twins result when two eggs are fertilied. Monozygotic (identical) twins come from a single fertilized egg that splits. But what if the egg splits and then each half meets a sperm? That’s the proposed theory for polar body or “half-identical” twins, twins who are very much alike but aren’t a 100% DNA match. Although it seems to be a reasonable theory, there is no definitive test to confirm polar body twinning.
More: Polar Body Twinning
5. Boy/Girl Identical (Monozygotic) Twins
Identical (monozygotic) twins are always same gender because they form from a single zygote that contains either male (XY) or female (XX) sex chromosome. However, there have been a few reported cases of a genetic mutation in male twins where one twin loses an Y chromosome and develops as a female. The female twin would be afflicted with Turner’s Syndrome, characterized by short stature and lack of ovarian development. Of course, another explanation for gender differences in identical twins is an identical twin who undergoes a sex change operation.
More Info
6. Mirror Image Twins
Mirror image twins are monozygotic, twint that form from a single fertilized egg. When the split occurs late – more than a week after conception – the twins can develop reverse asymmetric features. This term is not really a type of twin, just an way to describe their physical features. For exmample, they may be right- and left-handed, have birthmarks on opposite sides of their body, or have hair whorls that swirl in opposite directions. In theory, if the twins faced each other, they would appear to be exact reflections of each other. About 25% of identical twins are mirror image twins.
More: Mirror Image Twins
7. Parasitic Twins
A type of conjoined tiwns that develops asymmetrically, with a smaller, less formed twin dependent on the stronger, larger twin. Manar Maged gained notoriety after being featured onOprah. A variation of parasitic twinning is fetus in fetu, where an abnormally formed mass of cells grows inside the body of its monozygotic twin. It survives during pregnancy, and even occasionally after birth, by tapping directly into the blood supply of the host twin. This reportdescribes an Indian man whose fetus in fetu was discovered as an adult.
More: Parasitic Twinning and Fetus in Fetu
8. Semi-Identical Twins
A type of twinning identified in a pair of three-year-old twins in 2007. Described as identical on the mother’s side but sharing only half their father’s genes, the rare twins developed when two sperm fertilized a single egg, which then split. One twin is a hermaphrodite being raised as a female, with both testicular and ovarian structures, while the other is anatomically male.
9. Twins with Different Birthdays
The most common explanation is a labor and delivery that begins before midnight on one day and ends after the clock changes to the next day. If that day happens at the end of the month, or even on New Year’s Eve/Day, the two babies can have birthdays in different months and even different years! Also, sometimes a pregnancy is prolonged to provide each baby with an optimal chance for survival. If preterm labor forces the delivery of one baby, doctors can successfully control the abor and delay delivery to give the other baby more time in the womb. Twins and higher multiples have been born days and even weeks apart.
More: Twins With Different Birthdays
10. Twins of Different Races
Heteropaternal superfecundation can explain cases of fraternal (dizygotic) twins with differing racial characteristics. In one case, the differentiation was due to a lab mix-up during an in-vitro procedure. However, in 2005 in the United Kingdom, two bi-racial parents conceived fraternal (dizygotic) twin girl twins, Kian and Remee Hodgson. Described as a “one in a million” occurrence, experts explain that the girls inherited different genetic characteristics from their mixed race parents. One is fair-haired and light skinned, while the other has dark hair, eyes and skin.

1. Conjoined Twins are monozygotic multiples that do not fully separate from each other due to the incomplete division of the fertilized ovum. The individuals will be connected at certain points of the body, and may share tissue, organs or limbs.

2. Twins Conceived Separately or Superfetation Twins occurs when an egg is released while a woman is already pregnant, resulting in twins that are conceived at different times.

3. Twins with Different Fathers or Heteropaternal Superfecundation occurs when fraternal (dizygotic) twins which are the product of multiple eggs being released in a single cycle are fertilized by sperm from separate incidences of sexual intercourse. In a case where a woman has sex with different partners, the twins could have different fathers and the appropriate term is heteropaternal superfecundation.

4. “Half Identical” Twins or Polar Body Twins is a theory at this time.  There are two types of twins, right? Dizygotic (fraternal) twins result when two eggs are fertilized. Monozygotic (identical) twins come from a single fertilized egg that splits. But what if the egg splits and then each half meets a sperm? That’s the proposed theory for polar body or “half-identical” twins, twins who are very much alike but aren’t a 100% DNA match. Although it seems to be a reasonable theory, there is no definitive test to confirm polar body twinning.

5. Boy/Girl Identical (Monozygotic) Twins occurs when there is a genetic mutation in male twins where one twin loses an Y chromosome and develops as a female. The female twin would be afflicted with Turner’s Syndrome, characterized by short stature and lack of ovarian development. Of course, another explanation for gender differences in identical twins is an identical twin who undergoes a sex change operation.

6. Mirror Image Twins are monozygotic, twins that form from a single fertilized egg. When the split occurs late – more than a week after conception – the twins can develop reverse asymmetric features. This term is not really a type of twin, just an way to describe their physical features. For example, they may be right- and left-handed, have birthmarks on opposite sides of their body, or have hair whorls that swirl in opposite directions. In theory, if the twins faced each other, they would appear to be exact reflections of each other. About 25% of identical twins are mirror image twins.

7. Parasitic Twins is a type of conjoined twins that develops asymmetrically, with a smaller, less formed twin dependent on the stronger, larger twin. A variation of parasitic twinning is fetus in fetu, where an abnormally formed mass of cells grows inside the body of its monozygotic twin. It survives during pregnancy, and even occasionally after birth, by tapping directly into the blood supply of the host twin.

8. Semi-Identical Twins is a type of twinning identified as identical on the mother’s side but sharing only half their father’s genes, the rare twins developed when two sperm fertilized a single egg, which then split.

9. Twins with Different Birthdays the most  common explanation is a labor and delivery that begins before midnight and ends on the following day. If that day happens at the end of the month, or even the end of a year, the two babies can have birthdays in different months and even different years. Sometimes a pregnancy is prolonged to provide each baby with an optimal chance for survival. If preterm labor forces the delivery of one baby, doctors can successfully control the labor and delay delivery to give the other baby more time in the womb. Twins and higher multiples have been born days and even weeks apart.

10. Twins of Different Races can be caused by heteropaternal superfecundation. There are cases of fraternal (dizygotic) twins with differing racial characteristics. In one case, the differentiation was due to a lab mix-up during an in-vitro procedure. However, there is a case where two bi-racial parents conceived fraternal (dizygotic) twin girl twins, experts explain that the girls inherited different genetic characteristics from their mixed race parents. One is fair-haired and light skinned, while the other has dark hair, eyes and skin.

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Do Blood Type, Hair Color or Eye Color Determine Paternity?

posted by admin @ 2:44 PM
Thursday, September 22, 2011

As a DNA Relationship specialist, I have a lot of folks tell me that they assume that they are or are not related because of eye color, blood type or general appearance. Many people say things like “but the baby looks just like me”  or ” I have a different eye color than everyone else in my family so I must be someone else’s child”.  I am here to tell you that appearances are not always  a good indication of who the parent is.  I would like to  offer some answers to these questions or assumptions.

It is not possible to conclusively confirm paternity by using blood typing. The only thing you can establish is that the parents of the child had specific blood groups such as A, B, AB, or O. This does not eliminate any one else within those groups. As you can see below there are many possible combinations based on blood type:

 

As you can see, blood type does not answer conclusively the question of paternity. And as well, appearance also cannot definitively answer that question.  I have often heard, “she/he has brown eyes and both of her parents have blue eyes” so they are not sure who their parents are.  Eye color  cannot conclusively determine paternity. Eye color follows a polygenic inheritance pattern, and is probably controlled by 6 or more genes. Generally, these genes express themselves as one of 8 different eye colors. “Dark” is dominant at each of the 6 genes. The more dominant alleles present, the darker eye color appears. Therefore, eye color provides an even lower level of certainty than blood typing in determining paternity.

The same thing stands for hair color, let’s say red. It takes 2 carriers (Rr) to have a red-headed child.When a red hair carrier mates with a non-carrier, their children are not red headed, but some of their children will carry the red hair r allele. The frequency of the r alleles in the population in fact remains constant. We cannot easily tell if a person is a red hair carrier (Rr) without examining his/her extended family members’ hair colors or analyzing his/her MC1R gene.  However, we can reasonably expect the population of red hair carriers is much greater than that of the redheads. Even though there is no redhead in your immediate family, the chance that you are a carrier (Rr) is still quite high. It is estimated that as many as one in four Caucasians in the US might be a red hair carrier. Therefore, if parents don’t actually have red hair, if they both carry the red hair gene their children can have red hair.

Therefore, as it turns out, there are so many variables when it comes to eye, hair , blood type or looks the most conclusive way to discover the truth is to perform a paternity or maternity test. I hope this provided your with valuable answers  and addressed your questions or concerns.

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No DNA Test Is Arnold Schwarzenegger’s Love Child Really His?

posted by admin @ 2:40 PM
Thursday, September 22, 2011

Multiple sources have confirmed that Arnold Schwarzenegger never asked for a DNA test to prove he was the father of Mildred Baena’s child.  In addition, Mildred Baena has yet to establish paternity which typically requires a DNA test.

Sources state that Baena’s husband was out of the country when the child was conceived and that he did not return until shortly before the baby was born.  In addition it is said that the child bears a striking resemblance to Schwarzenegger and to Schwarzenegger’s youngest son Christopher.

According to the American Association of Blood Banks an agency that also monitors DNA Paternity Testing, 3.5 out of 10 Paternity Test comes back as a negative.

Is Arnold Schwarzenegger safe to assume Mildred Baena’s child is his with out a DNA Test? Appearances can be deceiving especially when it comes to a persons DNA. Do you think Arnold Schwarzenegger should insist on a DNA test?

 

By Briana Rogers

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April 25th – Celebrate DNA DAY!

posted by admin @ 11:09 AM
Friday, April 15, 2011

That’s right, April 25th is National DNA Day! In 2003, it was proclaimed as such by both the US Senate and the House of Representatives. DNA Day is a remembrance of the advancements in DNA technology. Among them: a ground breaking article on the structure of DNA which was first published in 1953; and the completion of the Human Genome Project in 2003.While you might not have the day off, you might want to stop and think about just what DNA has done for us.

Whether you are in the industry as a geneticist, scientist, doctor, of just a regular citizen, you probably understand how big of a contribution mapping our human genome has made to our lives. From medicine, cancer and disease research, the more we understand the better equipped we are to provide personalized medicine to each and every person. So this April, honor these advancements by taking some time to think about DNA and some of it’s many uses:

1. In archeology, DNA helps record genetic information of life on earth many centuries ago. This creates a data base that can be used to learn more about our planet’s past.

2. Genetic testing is used to determine the paternity or maternity of a child.

3. DNA testing can be used to help create a family tree or genealogical chart. Through genetic databases one can trace lost relatives or find their ancestral heritage. Using both the Y-Chromosome and Mitochondrial DNA people can use DNA testing to establish ancestral lines (both remain unchanged for generations). Now, technology is improving and recent advancements have been made in using non-sex chromosomes for ancestral research.

4. Prenatal genetic tests can help doctors determine whether or not the unborn fetus are predisposed to have certain health problems.

5. DNA tests are also used to help solve murders and other crimes. In recent years, many unsolved mysteries have been solved due to new and better types of analysis, as well as clearing many people found guilty of crimes that they did not commit.

6. DNA testing finds great use in the health field as DNA sometimes is the cause of rare medical conditions or heritable diseases.

7. Genetic testing is used in healths checks. For example it can be used to help determine the presence of viruses or cells that have mutated (causing cancer).

8. DNA tests are often used to reunite lost siblings or families or identify remains of the unknown. The genetics of a person leaves an indelible mark and this is used by police, military and authorities, as well as individuals to confirm relationships.

9. DNA tests on new species, or on material from outer space, help scientists and researchers determine the origins of a species and where they stand with reference to known living forms.

There are even more applications then the 9 mentioned, but this might give you a glimpse into the basic importance of our genetic relationship with ourselves and our surrounding. So, on April 25th, celebrate DNA Day!

- By Briana Rogers

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Priority Three Immigration

posted by admin @ 12:40 PM
Friday, January 7, 2011

Humanitarian efforts can be very delicate issues, and the U.S. State Department’s suspension of the East African family-reunification (or Priority Three) is a prime example. The program, was instituted to reunify families from civil war-torn areas with relatives living in the U.S..  The program was suspended in March of 2008 and has not been reopened at this time.

According to the State Department in February of 2009:

There are currently three priorities or categories of cases that have access to the U.S. Refugee Admissions Program. Priority One and Two applicants are granted access to the program through an individual referral by the United Nations High Commissioner for Refugees (UNHCR), a U.S. Embassy or qualified NGO, or by membership in a group of cases designated as having access to the program by virtue of their circumstances and apparent need for resettlement. Priority Three, or P-3, refers to individual cases from eligible nationalities who are granted access for purposes of family reunification with certain legal residents in the United States.

The State Department decided to preform DNA test on the P-3 starting with the embassy in Kenya to test for fraud.  What they discovered is that the rate of fraud varied from country to country but they were able to confirm biological relationships between fewer than 20% of the cases tested (family units outside the U.S.).

The suspension of this program effects families in a variety of locations including:  Afghanistan,  Bhutan,  Burma,  Burundi,  Central African Republic (CAR), Colombia, Cuba, Democratic People’s Republic of Korea (DPRK),  Democratic Republic of Congo(DRC), Eritrea, Ethiopia, Haiti, Iran, Iraq, Somalia, Sudan, Uzbekistan and Zimbabwe.

As of October 22, 2008, the Department of State stopped accepting Affidavits of Relationship (AORs) for all nationalities. Although in some location where there was no evidence of fraud (Bangkok, Cairo, Havana, Ho Chi Minh City, Istanbul, Kathmandu, Moscow, and Vienna) there are a small number of AORs that were submitted and cleared prior to March 2008 are being processed. No new applications will be accepted for any nationality at this time.

This does not mean that the State Department has not been working to assist the refugee populations seeking admittance to the U.S.  According to the State Department:

We continue to work closely with UNHCR to determine which African refugee populations are appropriate candidates for group and individual referrals. For example, we recently authorized the processing of several thousand Eritrean refugees in a camp in Ethiopia and continue to receive P-1 (individual) referrals of Congolese, Burundians, Somalis, and other African nationalities.

To Read More

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Paternity Fraud Hasn’t Gone Away

posted by admin @ 12:39 PM
Thursday, December 30, 2010

Laws about child support and child custody are different from state to state all of them require that there is solid proof that a relationship exists. If you want to get custody of a child you need to prove that you are related to that child. Unfortunately there are still situations where paternity is “assigned.”  Paternity is “assigned” when, a child is born to the wife during a marriage this is called “presumption of legitimacy”, and the husband is assigned complete rights, duties and obligations as to the child.  In the case of an unwed mother, a man may come forward and accept the paternity of the child, or the mother may petition the court for a determination, or paternity can be determined over time by showing that a man has been supporting a child in the ways of a father.

Non of those ways of determining paternity actually answers the question about who the father is. Many states have started to in act what are called paternity fraud laws which give a man the chance to dispute his role as the father. Traditionally relationships between parties were often determined by what was “reasonable” to assume. With DNA technology available for widespread use it has caused a change in the way paternity claims are dealt with.

More often than ever before a large group of shocked possible fathers are discovering that the children they’ve raised as their own are not biologically theirs. The mental impact of such a discovery can range from distressing to devastating, there is additional emotional distress when the man who has been known as the child’s father suddenly understands that he’s paid years of child support payments, sometimes many, many thousands of dollars, for another man’s child.

A great example is the case of Bert Riddick of California. As reported in a Los Angeles Times story Mr. Riddick was getting ready to leave on a business trip when his fiance discovered a court summons. In that summons Riddick was called forward as the father of his ex-girlfriend’s baby. Riddick had to attend to business elsewhere and didn’t go to the hearing. On his return he discovered that his wages were already being garnished. He had fallen victim to a common practice of declaring a man “guilty” by default.  Bert Riddick was declared the father because he had not proven otherwise.  This ruling destroyed Riddick’s new family financially. The Riddick family was forced to rely on the kindness of relatives who allowed them to stay in their home, the Riddick children in a tiny room together. Though Riddick’s life had been brought to ruin and his family became destitute. A simple home DNA test eventually proved that Bert Riddick was not the father of the child he’d had his wages garnished for all these years, but it wasn’t until years later that the State of California released him from the financial obligation to a child that wasn’t biologically his.

Another good example is the case of Doug Richardson of Michigan who, paid child support for fifteen years on a child that wasn’t his.  He paid roughly $80,000 in support. Mr Richardson claimed in the Detroit News that not only was he supporting a child who was not his, but he was financially supporting the child’s biological father a man involved with Richardson’s ex-wife. Mr. Richardson says he’s been tormented by this issue for the last fifteen years. Richardson was forced to file bankruptcy because he couldn’t pay his bills, back taxes and the penalties that go with them.

Fraudulent child support collections have destroyed the lives of many men.  A dozen other states offer legal protection to men who disprove paternity in such cases but still others do not. In 2005 almost twenty five percent of the states DNA paternity tests done for children born out-of-wedlock proved to be negative. In Georgia, if a man proves that he is not a child’s father his child support order will be ended. Maryland no longer has a limit on how long one can take to challenge a paternity case, something a lot of other states are looking at seriously. DNA paternity testing is now an established and important legal part of many paternity cases in the United States.

If you have any doubts or questions about the paternity of a child you might be supporting look into your states paternity law and get a DNA paternity test.  Knowledge is the best protection you have.

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DNA Testing – Are You Raising Someone Else’s Child?

posted by admin @ 10:45 AM
Friday, November 5, 2010

By Tom LeBaron

Back in the 1700s, the best way to determine who a persons father was, was by taking a good hard look at the child, followed by a good hard look at the father. If there were enough coincidences then maybe a relationship could be possible. by the 1800s, it was discovered that eye color could be a paternity identifier. With recent DNA advances we have learned that the eye color theory is flawed. We now know that eye colour is determined by at least six different alleles, or genetic markers. Fortunately paternity testing has become a lot easier and much more affordable over the past few years due to advances in DNA science.

Although an estimated 200,000 DNA tests are conducted each year by states needing to determine child-support and welfare issues, not as many people are willing to conduct their own at-home paternity test because they don’t realize the simplicity and convenience of an at-home paternity test.

How does home DNA testing work?

Paternity testing requires a painless sample from both the child and possible father. Even without a sample from the mother, DNA paternity test results are up to 99.9% accurate. Most companies provide testing material which they will mail directly to you so that you can provide the samples.

Because of advances in DNA testing it is no longer necessary to draw blood. Buccal (mouth) swabs are the standard. These swabs have the same genetic information that is carried in blood but none of the hazards. By gently massaging the inside of the child’s mouth, cheek cells are collected. These cells are then sent to the lab for testing. Labs analyze up to sixteen genetic markers of the child and match them against the markers of the alleged father. Because each of us receives half our genetic markers from each parent, the results of DNA paternity testing are still accurate without the DNA information of the mother but a really good test will include the mother this helps insure that there is no chance of a false positive.

What else can a DNA test do?

DNA test kits can also be used to analyze sibling relationships, establish cousin or grandparent relationships, determine twin zygosity (i.e. whether twins are fraternal or identical), identify ancestral origin, verify Native American decent, assure parents they left the hospital with the right baby, and most important, provide legal evidence – be prepared to pay a bit more for legal tests. Legal tests can be used to settle adoption issues, settle child-support disputes, and provide information for immigration files. Legal tests can not be preformed using a home test kit.

How to choose a DNA laboratory

  • Accreditation is a vital part of choosing a laboratory. Accredited labs have an annual audit and inspection, undergo internal and external reviews, and have their equipment calibrated for accuracy. Look for an ISO and/or AABB certification. Accredited labs will have a good reputation and near 100% track record for court cases.
  • Make sure you understand all the fees.  Keep an eye out for hidden fees. Some companies will charge you for the kit and then charge you again for the results.  This is especially true of kits purchased at a pharmacy or store.
  • Double check when you order your kit that you’re only buying the results you need.  If you need a test for any official purpose (changing a name or birth certificate) Make sure you are getting a legal test.
  • Ask about privacy. Make sure that your identity and intentions are kept secure.

Enjoy piece of mind. Be confident that the questions you have can be answered and that DNA testing is safe easy and stress-free.

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To Be The Father Or Not To Be…

posted by admin @ 3:17 PM
Tuesday, September 14, 2010

By Martin Myers

Before you can truly understand the importance of DNA paternity testing, you must first understand the DNA element involved and why DNA is used to establish paternity. DNA is the map of your genetic makeup. Each and every person has a different map of DNA. This having been said, persons who belonging to certain ethnic backgrounds, or certain races, can have DNA that shows related characteristics. No two people, except for identical twins will have the same DNA.

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Do It Yourself DNA Testing

posted by admin @ 12:17 PM
Wednesday, September 8, 2010

By John Morris

DNA testing has only been popularized in recent years this is mainly due to it being extremely handy when it comes to high-profile criminal investigations and in paternity cases.  DNA, or deoxyribonucleic acid, is most commonly used in trying to prove the relationship between two individuals.

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Reasons For DNA Testing

posted by admin @ 2:13 PM
Tuesday, August 24, 2010

By Kevin Camilleri

DNA testing is becoming more and more popular as a way of establishing family relationships and catching criminals. But why is DNA testing specifically preferred over blood testing and other methods of detecting parentage and what are the most significant reasons for its ongoing usage in both legal and medical circles?

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