Palo Alto, California (The Adobo Chronicles) – Twenty years ago, a study by American scientist Dean Hamer claimed to have discovered a so-called “gay gene” – but his research was criticised vocally by several right-wing US politicians and certain members of the religious community.

Now, scientists at the Human Genome Project have found evidence pointing to the existence of not one, but two or more so-called “gay genes.”

“Sexual orientation has nothing to do with choice,” said lead researcher Michael Bailey of Northwestern University in Chicago. “Our findings suggest there may be genes at play, and we found evidence for two sets that affect whether a man is gay or straight.”

Meanwhile, researchers at Stanford University are about to announce the results of a ground-breaking study that explains why people become heterosexual. They discovered a mutant gene which they named HTXL-1 which is responsible for a person’s heterosexual orientation.

“During the first three months of pregnancy, human genes circulate inside the fetus, trying to claim their proper position in the baby’s overall genetic makeup,” the researchers said. “During this process, a few genes mutate, causing a great imbalance in the genetic makeup. This mutation and imbalance produce right-leaning genes and eventually determine a person’s heterosexual orientaion,” they added.

The study concluded that 90% of fetuses develop these mutant genes.