Gay genes in identical twins
Homosexuality may be caused by chemical modifications to DNA
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The relationship between biology and sexual orientation is a subject of research. A simple and 'MZ' indicates identical twins with the same sets of genes and 'DZ' indicates fraternal twins where genes are mixed to an extent similar This was popularly dubbed the "gay gene" in the media, causing significant controversy.
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Identical twins have the same genes or DNA. They are nurtured in equal prenatal conditions. If homosexuality is caused by genetics or prenatal conditions and.
Description:Scientists have been looking for the "gay gene" for decades, and more recent research has demonstrated that boys with older brothers are more likely to grow up to be gay. Now, we may know why. Andy Coghlan from New Scientist explains: Anthony Bogaert at Brock University, Canada, and his team think that some women who are pregnant with boys develop antibodies that target a protein made by the Y chromosome.