Scientists did not find “gay strands” in human DNA in the course of getting answers on how homosexuality is formed. It does get passed on to family members suggesting hereditary nature but traits are not always acquired through genes. Researchers at the National Institute for Mathematical and Biological Synthesis (NIMBioS) say that the answer may in the fetal stage. The new theory suggests that hormones received in the womb may be the deciding factor on someone’s homosexuality. The DNA absorbs these hormones which also regulate activity or inactivity of certain genes.
Epigenetics is a new science that study unaltered genes that gets passed on to at least one successive generation. The cellular material epigenome switches the gene on or off during fetal gestation up to early years in life and could make a permanent imprint on the gene which is passed to the next gene holders. This epigenome could be responsible for the homosexual traits that are attributed to the hormonal absorption during the fetal stage.
William Rice, an evolutionary biologist from the University of the California explains it in simple words. He said that epigenetics is accountable for similarity and dissimilarity of family members which also contributes to the inheritance of homosexuality. Rice has created a mathematical model to prove the theory of epigenetic passing of traits. He reasoned that if homosexuality was solely genetic, homosexuality would have ceased to exist many years ago through evolution, as homosexuals would not be expected to reproduce. “Epigenomes protect the fathers and mothers from excess or underexposure to testosterone which carries over to the opposite sex offspring. This can cause the masculinization of females and the feminization of males.” It will also be observed that a gay child would resemble the opposite-sex parent which is significant to proving the theory.
There is a strong show of interest among scientists willing to embark on experiments to test the epigenetic theory. The cellular findings may also be the key to understanding and preventing diseases like obesity and diabetes. NIMBioS researcher Sergey Gavrilets is an author for The Quarterly Review of Biology who wrote about the theory of homosexuality. Gavrilets aims to dispel all misconceptions about being gay, and to explain it in a scientific manner. He and his colleagues continue to be criticized by the conservative community who are not happy about the biological explanation to homosexuality.
Article publié pour la première fois le 19/04/2013