Identify some biological or genetic factors that influence sexual orientation behavior
Twins and families reared together
Various research identical twins have been carried out to determine if genes have an influence on sexual orientation behavior (Diamond, 2011). According to Diamond In one of the researches on monozygotic and dizygotic male twin pairs it was found out that at least one of the co-twins admitted to homosexual behavior. Additionally, it was found out that if one of the monozygotic twins was homosexually oriented his brother was also homosexually oriented. On the other hand the dizygotic brothers were not too different from the general male population relative to sexual preference. According to
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