Why are we gay

Scientists may have finally solved the puzzle of what makes a person gay, and how it is passed from parents to their children.

Massive Study Finds No Single Genetic Cause of Same-Sex Sexual Behavior | Scientific American

A group of scientists suggested Tuesday that homosexuals get that. Why are people gay? Are they gay by choice or is being gay genetic? Are they born gay? Learn about the causes and reasons for being gay. 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.

Homosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the same sex or gender.

{INSERTKEYS} [1][2][3] As a sexual orientation, homosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" exclusively to people of the same sex or gender. [4][failed verification] It also denotes identity based. Recently, scientists announced that they found some genes that might be associated with sexual orientation and a biological explanation for the reason gay men tend to have older brothers.

Image source, Getty Images. Height is another feature influenced by hundreds of genes, many of which interact with our external environments in complex ways. We believe sexuality is a highly complex trait, interwoven with sociality. This is called prosociality. This has nothing to do with George Orwell, but describes the observation that boys with older brothers are significantly more likely to become gay - with every older brother the chance of homosexuality increases by about a third.

Usually it's not inherited, but occasionally it is, leading to same-sex preference in boys. For example, female foetuses exposed to higher levels of testosterone before birth show higher rates of lesbianism later on. These figures may not be high enough to sustain genetic traits specific to this group, but the evolutionary biologist Jeremy Yoder points out in a blog post , external that for much of modern history gay people haven't been living openly gay lives.

Despite the associations, the authors say that the genetic similarities still cannot show whether a given individual is gay. We argue many of the evolutionary forces that shaped human sexuality were social, rather than based on reproductive ability. The rest was presumably a result of environmental or other biological influences. In our closest primate relative , the bonobo, straight and gay sex have vital roles in play, social transactions, barter of food, same-sex social bonding and bonding between mating pairs.

Subscription Plans Give a Gift Subscription. Many of the "straight" men who have sex with fa'afafine in Samoa go on to get married and have children. Elton John and David Furnish have had two children with a surrogate mother, although the identity of the biological father is secret. {/INSERTKEYS}

Is being gay a choice or are you born that way

Compelled by society to enter marriages and have children, their reproduction rates may have been higher than they are now. They asked more thanparticipants whether they had ever had sex with someone of the same sex, and also questions about sexual fantasies and the degree to which they identified as gay or straight. There is some evidence for this second theory.

There are two or more ways this might happen. Many studies since the pioneering research of Alfred Kinsey and colleagues have emphasised that sexual minorities occur across all culturesand the gay of gay and bisexual people in why have been quite stable over time. Early humans that could quickly and easily access the benefits of group living had a strong selective advantage.

Read more: Born this way? While that's a greater likelihood than random, it's lower than you might expect for two people with the same genetic code. August 29, 4 min read. Some of the gay person's genetic code is shared with nieces and nephews and so, the theory goes, the genes which code for are orientation still get passed down.

Image source, Thinkstock. Similarly in the West, there is evidence that many people go through a phase of homosexual activity.