Are Younger Brothers More Likely to Be Gay? | Psychology Today

Contents:

• YOUR GOOD HEALTH: WHY IS ONE ‘INTIL’ TW GAY, THE OTHER STRAIGHT?
• THE 'GAY GENE' IS A TOTAL MYTH, MASSIVE STUDY CONCLUS
• SCIENTISTS MAY HAVE FALLY UNLOCKED PUZZLE OF WHY PEOPLE ARE GAY
• LARGT STUDY OF GAY BROTHERS HOM ON 'GAY GEN'
• ARE YOUNGER BROTHERS MORE LIKELY TO BE GAY?
• TWS WERE BORN TO A GAY COUPLE. ONLY ONE CHILD WAS REGNIZED AS A U.S. CIZEN, UNTIL NOW.
• THERE IS NO ‘GAY GENE.’ THERE IS NO ‘STRAIGHT GENE.’ SEXUALY IS JT PLEX, STUDY NFIRMS

YOUR GOOD HEALTH: WHY IS ONE ‘INTIL’ TW GAY, THE OTHER STRAIGHT?

In fact, scientists recently intified two specific gen that appear to differ between gay and straight men [1].

THE 'GAY GENE' IS A TOTAL MYTH, MASSIVE STUDY CONCLUS

In s like this, some might argue that perhaps both tws are actually gay, but one jt hasn’t e out yet. In a study where scientists looked at the sexual aroal patterns of intil tws wh different sexuali—specifilly, where one was gay and the other was straight—they found that gay tws monstrated more genal aroal rponse to same-sex imag, whereas straight tws monstrated more aroal rponse to oppose-sex imag [2]. In theory, this means two people uld rry “gay gen, ” but both of them wouldn’t necsarily be gay pendg on certa environmental factors.

012% of the populatn nsists of a gay or bisexual person who happens to have an intil tw [2].

If their DNA gen are “intil, ” now that they are adults, how n one be homosexual, while his tw is married wh children?

SCIENTISTS MAY HAVE FALLY UNLOCKED PUZZLE OF WHY PEOPLE ARE GAY

As time go on, scientists have regnized that not everybody fs to the clear-cut tegori of “straight” and “gay.

Studi have shown that intil tws, if one tw is gay (the term “homosexual” is ed clil studi but is nsired offensive, so I won’t e further), then 30 per cent to 66 per cent of the intil tws also will be gay. However, an adopted siblg of a gay person is also more likely to be gay (11 per cent one study), suggtg that the faial environment also plays a signifint role.

LARGT STUDY OF GAY BROTHERS HOM ON 'GAY GEN'

Tw pairs which at least one tw is homosexual were soliced through announcements the gay prs and personal referrals om 1980 to the prent. Two sets ntaed a pair of monozygotic tws nrdant for sexual orientatn wh the third triplet dizygotic and disrdant for homosexual orientatn.

A third triplet set was monozygotic wh all three nrdant for homosexual orientatn.

Human homosexualy: a paradigmatic arena for sexually antagonistic selectn?

ARE YOUNGER BROTHERS MORE LIKELY TO BE GAY?

Fecundy of paternal and maternal non-parental female relativ of homosexual and heterosexual men. No dividual gene alone mak a person gay, lbian or bisexual; stead, thoands of gen likely fluence sexual orientatn, a massive new study of the genom of nearly half a ln people human societi and both sex, between 2% and 10% of people report engagg sex wh a member of the same sex, eher exclively or addn to sex wh a member of the oppose sex, the rearchers said. Related: 5 Myths About Gay People Debunked"Bee is a ntroversial topic, fundg has historilly been limed and recment of participants was difficult, " study -thor Fah Sathirapongsasuti, a senr scientist and putatnal blogist at the geic ttg pany 23andMe, told Live Science.

However, the fdg that there's no sgle gay gene do not mean that sexual orientatn is not geic or blogil, and is therefore a liftyle choice. 13 Facts on the History of Marriage51 Sultry Facts About Sex10 Milton Gay Rights HistoryOrigally published on Live Science. Scientists may have fally solved the puzzle of what mak a person gay, and how is passed om parents to their children.

A group of scientists suggted Tuday that homosexuals get that tra om their oppose-sex parents: A lbian will almost always get the tra om her father, while a gay man will get the tra om his heredary lk of homosexualy has long been tablished, but scientists knew was not a strictly geic lk, bee there are many pairs of intil tws who have differg sexuali.

TWS WERE BORN TO A GAY COUPLE. ONLY ONE CHILD WAS REGNIZED AS A U.S. CIZEN, UNTIL NOW.

Scientists om the Natnal Instute for Mathematil and Blogil Synthis say homosexualy seems to have an epigeic, not a geic thought to have some sort of heredary lk, a group of scientists suggted Tuday that homosexualy is lked to epi-marks — extra layers of rmatn that ntrol how certa gen are exprsed.

In homosexuals, the epi-marks aren't erased — they're passed om father-to-dghter or mother-to-son, explas William Rice, an evolutnary blogist at the Universy of California Santa Barbara and lead thor of the study. "There is pellg evince that epi-marks ntribute to both the siary and dissiary of fay members, and n therefore feasibly ntribute to the observed faial herance of homosexualy and s low nrdance between [intil] tws, " Rice and his team created a mathematil mol that explas why homosexualy is passed through epi-marks, not geics. Evolutnarily speakg, if homosexualy was solely a geic tra, scientists would expect the tra to eventually disappear bee homosexuals wouldn't be expected to reproduce.

THERE IS NO ‘GAY GENE.’ THERE IS NO ‘STRAIGHT GENE.’ SEXUALY IS JT PLEX, STUDY NFIRMS

But bee the epi-marks provi an evolutnary advantage for the parents of homosexuals: They protect fathers of homosexuals om unrexposure to ttosterone and mothers of homosexuals om overexposure to ttosterone while they are gtatn. "The epi-marks protect fathers and mothers om excs or unrexposure to ttosterone — when they rry over to oppose-sex offsprg, n e the masculizatn of femal or the femizatn of mal, " Rice says, which n lead to a child beg gay.