Woman Carries Twin Brother Dna in Blood Rare Chimera Case | DNA of twin brother in woman’s blood, know the whole matter
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XY Chromosome Found in Woman: A Brazilian woman has found XY chromosomes of her twin brother in the blood, while the rest of the body has XX chromosomes. This is a rare case, which is being discussed worldwide.

According to BBC report Usually women are born with XX chromosomes and are born with male XY chromosomes. However, both types of chromosomes have been found in Ana’s body. This means that the characteristics of both men and women are present in his body. This case has been seen for the first time in the history of medical science. When Ana’s blood test was done, the doctors found that her blood cells contain men’s XY chromosomes, while the rest of the body’s cells had XX chromosomes with female. This is quite unusual, as all parts of the body contain the same type of chromosomes. This came to light when Ana faced abortion in 2022 and this unique fact was revealed during the investigation.
Such a case is called Cimera in medical science. This means that a person has two different DNAs in his body. This situation occurs when a person provides bone marrow transplant. However, this has happened in Ana’s case, which is very rare. It states that nature sometimes creates such miraculous matters. Doctors believe that when Ana and her twins were in the mother’s womb, the blood vessels in their placenta joined each other and the blood went into each other’s body. This is called fatal-fatal transfusion. In this process, the blood cells of the child’s blood goes into each other’s body, which settled the blood cells of her brother’s XY chromosome in Ana’s body.
Usually when a body receives the cells of another person, its immune system removes it, but Ana’s immune system accepted its brother’s cells and did not harm them. Such tolerance is important for researchers, as it can provide new information in organ transplant and immune research. Ana gave birth to a healthy son despite this unique condition. Investigation of the child’s DNA found that he was completely normal and his DNA had neither a part of Ana’s brother nor any other problem.

Amit Upadhyay is working as a senior sub-editor in the lifestyle team of News18 Hindi. He has about 8 years of experience in print and digital media. He writes stories on the topic related to health and lifestyle. ,Read more
Amit Upadhyay is working as a senior sub-editor in the lifestyle team of News18 Hindi. He has about 8 years of experience in print and digital media. He writes stories on the topic related to health and lifestyle. , Read more