The Genes

Thinking about the origins of homosexuality, it is clear that is comes, at least partially, from one’s genetic make-up. Many studies have been done that show a higher instance of shared homosexuality between monozygotic twin males than in fraternal twins, and even more so than in non-twin brothers, suggesting a coloration between shared genetic make-up and shared homosexuality. Also, studies have shown that there are certain parts of a gay male’s brain that are different sizes from their straight male counterparts, often closely mimicking the size of straight females. These studies suggest that some sort of fundamental prenatal developmental difference exists between homosexuals and heterosexuals that causes their brains to develop differently, and therefore have different predispositions with regard to sexuality. Further strengthening this genetic, or 'nature' argument are the gathered statistics that show gay men are more likely to be left-handed, or exhibit other shared qualities. Another study, though never recreated, offered a proposed X-Chromosome correlation that was shared by an inordinately large percentage of gay brothers. All of these studies and statistics, then, point to the genetic predisposition for homosexuality.