Scientists close the debate: Learn the Two Reasons for Homosexuality

This is the completion of a multi-debated study conducted by an international team of researchers over one and a half million people.

They say that there is not only one gene that allows sexual behavior to predict but thousands of variants that contribute to environmental and cultural impact.

The study published in Science magazine also represents the broader genetic research on the subject of homosexuality.

Earlier studies suggested the presence of strong genetic signals that could allow sexual behavior to be predicted; one of the most popular focused on the X chromosome, but in the latest study, with a champion 100 times greater than that, it has demonstrated that it is not.

Researchers have examined the data of more than half a million people present in two large genetic banks.

An examination of the genome has been made in order to see which genes may be related to sexual behavior stated by people on form. And it has resulted in five genetic variants significantly linked to homosexuality.

Small differences in DNA that have shown a clear link to homosexual behavior, two found in both men and women, two only in men and one in women.

Even combined, all five genetic variants explain less than 1 percent of homosexual behavior, suggesting that many other options may be involved, each with a very small role.