Wife Gets Angry and Demands Divorce When Asked for Paternity Test
"I Think the Child Has Been Switched," but She Doesn't Understand Even After Explanation
According to common knowledge about blood types, if both parents have blood type A, their child should have blood type A or O. However, this is not always the case. This is because mutations can occur in blood types. Therefore, blood type alone cannot be used to definitively determine family or parent-child relationships 100%. In this context, on the 3rd, a post titled "Wife wants a divorce if we do a paternity test" was uploaded on the employee community Blind.
According to common knowledge about blood types, if both parents have blood type A, their child should have blood type A or O. However, this is not always the case. Blood types can also undergo mutations. [Photo source=Pixabay]
The author, Mr. A, said that his wife recently gave birth to a son whose blood type was O. Since the wife is AB blood type and Mr. A is type O, the appearance of an O-type son, which should not be possible, led Mr. A to suggest a paternity test. In response, the wife became furious and said, "What do you take me for? This is so humiliating. He is your child. If you feel this way, let's get a divorce."
Mr. A said, "'Since you are AB blood type, it is impossible for the child to be O type. It seems the child was switched,' but she wouldn't listen," and asked for advice from netizens. When parents are AB and O blood types respectively, the possible blood types for their child are A or B. This is because the AB parent carries A and B genes, and the O parent carries O genes. Scientifically, there is also a possibility that the child was switched. Netizens responded to the story with comments such as, "It seems the child was switched or the blood test was wrong," and "I know people who are mistaken about their own blood types. First, both parents should get their blood types tested again." One netizen also advised, "There are other mutations like hereditary chimerism, so make sure to check thoroughly."
An O-type child can be born between AB and O blood types
Although it is extremely rare, a child with blood type O can be born between parents with blood types AB and O. This is due to the cis-AB blood type, a mutation of the ABO blood group system. People with unique blood types like cis-AB do not follow the typical genetic inheritance patterns of blood types. [Photo by Pixabay]
Although extremely rare, an O-type child can be born between parents with AB and O blood types. This is due to the cis-AB blood type, a mutation of the ABO blood group system. People with the unique cis-AB blood type deviate from the usual blood type inheritance rules. Normally, when an AB blood type marries an O blood type, only A or B type children are born, but when a cis-AB type marries an O type, AB or O type children can be born.
In the case of cis-AB, one of the A or B antigens is weakly expressed, so during blood type testing, the person may be diagnosed as A or B instead of AB. This can cause unnecessary misunderstandings within families or require special attention during red blood cell transfusions, as blood products other than AB type must be used. Usually, cis-AB is created when only one parent passes down the AB genotype.
The cis-AB blood type was first discovered in Jeonnam through a pedigree study in 1985 and is a rare blood type still found in parts of Jeonnam and northern Kyushu, Japan. In 2015, the cis-AB blood type caused by mutation was discovered for the first time in Korea. At that time, a 29-year-old woman found out she had the cis-AB blood type during a blood test while visiting a hospital for ovarian cyst surgery. The test results showed that she did not inherit the cis-AB gene from her parents, as both her father and mother were regular B blood type. Therefore, this was recorded as the first case of cis-AB caused by a new genetic mutation occurring in the individual herself.
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