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US scientists find being gay is 40% genetic

in UNITED STATES, 15/02/2014

A study of 400 pairs of twins has found that gay men share genetic signatures in their chromosomes but also that sexual orientation is not entirely genetic in cause.

New research by Chicago’s Northwestern University indicates that specific genes can increase the chance that a man will be homosexual.

Researchers studied the genetic makeup of 400 pairs of twins and found that those that were openly gay were more likely to share similarities in the Xq28 region of their X chromosome and also in Chromosome 8.

The researchers believe this shows that genetics is about 30 to 40% responsible for determining a man’s sexuality.

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