Scholars from National University of Colombia (UNAL) found a case twins From parents Different, after studying the request of a man investigating the paternity of children.
According to the foundation’s statement, the analysis began in August 2018, when the scientific team received a request to prove the paternity of two people. twins Males with genetic markers, by the alleged father, who has been suspicious of the children’s relationship and is asking for paternity tests.
Lilián Andrea Casas Vargas, PhD in Science and Biology from UNAL, said that when there are very difficult cases or you want to confirm the result, the laboratory does other markers. In this case, they did one job known as “Y chromosome plaque”, since twins They are males.
He explained that it is a widely used tool for parental tests. “The Y chromosome is only secreted by the father, and it does so in mass form from one generation to the next, and it never changes.”
By not changing, these Y chromosome markers would be expected to be completely identical to that of the paternal. In this case, the genetic profile coincides with one twins, While with the other, 14 of the 17 were identified non-coincidental.
The expert explained that upon reaching the conclusion, the procedure was required to be repeated to ensure that there were no technical errors. After the mechanism was put into operation again, the case was confirmed, and its report, due to its scarcity, was published in Biomedical Journal From the National Institute of Health.
at ColombiaParental heterogeneous over-fertilization, as it is known in a specialized method, is a condition twins From parents Different, it is an extremely rare phenomenon that occurs when the second egg, which is released during the same menstrual cycle, is fertilized by a sperm from a different man in separate sexual intercourse.
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