Why Are There Gay Men?
Why are there homosexuals? At first glance, it’s a silly, even offensive question—some people are gay, and you’ll just have to deal with it. But for biologists, it’s a real puzzle. How, after all, could evolution create people genetically predisposed not to breed (at least, not without third-party assistance)?. By Sara Reardon. Controversial results released in suggested a genetic link between bisexuality and risk-taking , but many researchers found flaws in the methodology. 
The evolutionary puzzle of homosexuality
Estimates as to the number of gay people in the population range from 1-in to 1-in, so why are some people gay? Are they gay by choice or is being gay genetic? The simplest answer is to look at the definition of the word "gay." The term gay is a synonym for homosexual, which is defined as, 1,2 "Of, pertaining to, or exhibiting sexual desire or behavior directed toward a person or persons. In the last two decades, dozens of scientific papers have been published on the biological origins of homosexuality - another announcement was made last week. It's becoming scientific orthodoxy.
Homosexuality
Homosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the same sex or gender. [1][2][3] It also denotes identity based on attraction, related behavior, and community affiliation. [4][5] Along with bisexuality and heterosexuality, homosexuality is one of the three main categories of sexual orientation within the heterosexual–homosexual continuum. [4. Reviewed by Psychology Today Staff. Sexual orientation describes patterns of sexual, romantic, and emotional attraction —and one's sense of identity based on those attractions. Sexual Orientation
Some of the gay person's genetic code is shared with nieces and nephews and so, the theory goes, the genes which code for sexual orientation still get passed down. Why are there homosexuals? How, after all, could evolution create people genetically predisposed not to breed at least, not without third-party assistance? 
There is no ‘gay gene.’ There is no ‘straight gene
There is no single gene responsible for a person being gay or a lesbian. That’s the first thing you need to know about the largest genetic investigation of sexuality ever, which was published. Estimates as to the number of gay people in the population range from 1-in to 1-in, so why are some people gay? Are they gay by choice or is being gay genetic?
Why Are People Gay? Gay By Choice or Is Being Gay Genetic?
The evolutionary paradox of homosexuality Being gay no longer holds the stigma it once did, but in evolution, why does a non-reproductive trait persist? Exclusive US Offer - try a BBC Science Focus Magazine subscription and get your first 3 issues for only $ PLUS get delivery from the UK!. .
Massive Study Finds No Single Genetic Cause of Same
What causes sexual orientation? It’s not completely known why someone might be lesbian, gay, straight, or bisexual. But research shows that sexual orientation is likely caused partly by biological factors that start before birth. People don’t decide who they’re attracted to, and therapy, treatment, or persuasion won’t change a person’s sexual orientation. You also can’t “turn. . The evolutionary paradox of homosexuality
A massive study of half a million people finds no single gene behind sexual orientation, adding more evidence that there is no “gay gene”. .