Epigenetic Switches May be Reason behind Homosexuality
In a recent study by researchers, it has been found that homosexuality occurrence may be depending on epigenetic switches.
Epigenetic switches are the one that control the sensitivity to male hormones while the baby is in the fetus. Researchers earlier made attempts to find the genes that are linked to homosexuality but the study found no good results as no such gene was discovered.
Sergey Gavrilets, a theoretical evolutionary Biologist at the University of Tennessee's National Institute for Mathematical and Biological Synthesis, USA, and his American and Swedish colleagues studied the 50 years literature on homosexuality and derived these results.
They said the sensitivity to sex hormones while the fetus is developing is regulated differently for homosexual and heterosexual people. A mathematical model of the same was made by them to check the validity of their ideas.
The epigenetics are responsible for this regulation. They control the way in which the genes are switched on and off depending on the nutrition and other stimuli.
"When you have identical twins and one is heterosexual and the other one is not, you have to look at other non-genetic explanations. That is why the epigenetics becomes useful", Ryszard Maleszka, a Geneticist at the Australian National University in Canberra.
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