Scientists fd DNA differenc between gay men and their straight tw brothers - Los Angel Tim

Contents:

• YOUR GOOD HEALTH: WHY IS ONE ‘INTIL’ TW GAY, THE OTHER STRAIGHT?
• JOHNS HOPKS REARCH: NO EVINCE PEOPLE ARE BORN GAY OR TRANSGENR
• SCIENTISTS FD DNA DIFFERENC BETWEEN GAY MEN AND THEIR STRAIGHT TW BROTHERS
• STUDY: DNA OF INTIL TWS CAN REVEAL WHO'S GAY
• GAY GEICSMOST OF BELIEVE THAT WE WERE BORN THAT WAY, BUT IS SEXUAL ORIENTATN OUR DNA? JV CHAMARY GO SEARCH OF THE GAY GENEJV CHAMARYPUBLISHED: MAY 31, 2009 AT 11:00 PMGAY GEICS
• GAY MEN TW STUDY
• NEW TW STUDY: PEOPLE NOT BORN GAY
• SOME RANDOM THOUGHTS ON ‘GAY GENE’ STUDI

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]. 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.

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.

JOHNS HOPKS REARCH: NO EVINCE PEOPLE ARE BORN GAY OR TRANSGENR

If their DNA gen are “intil, ” now that they are adults, how n one be homosexual, while his tw is married wh children? 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. About half of the homosexual/bisexual populatn ( a non-theraptic environment) mov towards heterosexualy over a lifetime.

Numbers of people who have changed towards exclive heterosexualy are greater than current numbers of bisexuals and homosexuals bed. “The thors were pro-gay and they mented that the only stabily was among the heterosexuals, who stayed the same year after year.

SCIENTISTS FD DNA DIFFERENC BETWEEN GAY MEN AND THEIR STRAIGHT TW BROTHERS

Scholars at Johns Hopks Universy released a new report on Monday which argu that there is not sufficient evince to suggt that lbian, gay, or transgenr people are born wh this sexual orientatn or genr inty. “There are probably some people that intify as hetrosexual [sic] that then later on intified as homosexual, so go both ways. The three-part, 143-page report, which appeared the Fall 2016 edn of The New Atlantis, also vtigated other monly accepted ias about homosexualy and transgenrism.

Mayer and his -thor Pl McHugh, a profsor of psychiatry and behavral scienc at Johns Hopks, challenged the claim that discrimatn and social stigma are the only reasons why homosexual and transgenr people suffer higher rat of mental health problems and are more likely to m suici. The study breaks down three parts: First, Mayer and McHugh examed whether homosexualy is an hered tra, and nclud that people are not simply “born that way. ” Send, they looked at the of the poor mental health associated wh gay and transgenr people, ncludg that social strs do not expla all of .

“Studi of the bras of homosexuals and heterosexuals have found some differenc, but have not monstrated that the differenc are born rather than the rult of environmental factors that fluenced both psychologil and nroblogil tras, ” the report explaed. For women, both tws had at least one homosexual partner 22 percent of intil tws and 17 percent of aternal tws.

STUDY: DNA OF INTIL TWS CAN REVEAL WHO'S GAY

There is virtually no evince that anyone, gay or straight, is ‘born that way’ if means that their sexual orientatn was geilly termed, ” the report explaed (emphasis add). “But there is some evince om the tw studi that certa geic profil probably crease the likelihood the person later intifi as gay or engag same-sex sexual behavr.

The report also found that gay and transgenr people are at elevated risk for a variety of mental health risks, cludg anxiety disorrs, prsn, substance abe, and suici.

Ngun reported that studyg the geic material of 47 pairs of intil male tws, he has intified “epigeic marks” ne areas of the human genome that are strongly lked to male dividuals, said Ngun, the prence of the distct molecular marks n predict homosexualy wh an accuracy of close to 70%. Geicists suggt that together, the human genome and s epigenome reflect the teractn of nature and nurture -- both our fixed herance and our bodi’ flexible rpons to the world -- makg who we ’s study of tws don’t reveal how or when a male tak on the epigenomic marks that distguish him as homosexual. ”To fd the epigenomic markers of male homosexualy, Ngun, a postdoctoral rearcher at UCLA’s Geffen School of Medice, bed through the geic material of 47 sets of intil male tws.

GAY GEICSMOST OF BELIEVE THAT WE WERE BORN THAT WAY, BUT IS SEXUAL ORIENTATN OUR DNA? JV CHAMARY GO SEARCH OF THE GAY GENEJV CHAMARYPUBLISHED: MAY 31, 2009 AT 11:00 PMGAY GEICS

But the existence of tw pairs which one is homosexual and the other is not offers strong evince that somethg other than DNA alone fluenc sexual orientatn. So they unleashed a mache learng algorhm on the data to search for regulari that distguished the epigenom of homosexual tw-pairs om tws which only one was ne pact regns sttered across the genome, they found patterns of epigenomic differenc that would allow a predictn far more accurate than a random gus of an dividual’s sexual orientatn, Ngun reported Thursday.

McCarthy and other experts utned that the disvery of epigenomic marks suggtive of homosexualy is a far cry om fdg the of sexual distctive epigenomic marks observed by Ngun and his lleagu uld rult om some other blogil or liftyle factor mon to homosexual men but unrelated to their sexualy, said Universy of Utah geicist Christopher Gregg.

But the existence of intil tw pairs which only one is homosexual “nclively suggt that gen don’t expla everythg, ” Bailey Ngun’s rearch needs to be replited larger studi of tws, advanc the fful procs of better unrstandg how — and when — a boy’s sexual orientatn velops, Bailey me on Twter @LATMelissaHealy and “like” Los Angel Tim Science & Health on rarely get ncer, now scientists thk they know whyThree rearchers w Nobel Prize chemistry for studi of DNA repairMars had a long-lastg seri of lak, NASA’s Cursy rover fds. In some pairs of tws, both might intify as heterosexual, but one tw may not accurately disclose his/her homosexualy.

GAY MEN TW STUDY

Heterosexual men rpond substantially more to femal than mal, and homosexual men rpond substantially more to mal than femal5, 6, 7, 8; th, on average, genal aroal and pupil dilatn patterns verify men’s reported sexual of all sexual orientatns rpond, on average, wh some level of aroal to erotic stimuli reprentg eher sex. However, this effect is pecially mon heterosexual women, whereas homosexual women rpond somewhat more to the same sex than other sex.

The fdg that heterosexual women are non-specific their rpons to mal or femal, whereas homosexual women rpond more to their preferred sex, was nfirmed wh other measur, cludg reactn time, viewg time, nral activy, and thermography of genalia8, 14, 15, the extent that self-reported differenc intil tws’ sexual orientatns are accurate, their sexual rpons will be siar to those of most heterosexual and homosexual dividuals. Hence, male pairs, we predicted that heterosexual tws would show substantially more sexual rpons to the other sex, whereas the homosexual -tws would show more aroal to the same sex. In female pairs, we predicted that heterosexual tws would show siar sexual rpons to both sex, whereas their homosexual -tws would show somewhat stronger sexual rpons to the same sex than the other sex.

NEW TW STUDY: PEOPLE NOT BORN GAY

Furthermore, if tws’ sexual rpons reflect general sexual orientatn differenc, then their sexual rpons should be siar effect to the rpons seen unrelated heterosexual and homosexual dividuals.

SOME RANDOM THOUGHTS ON ‘GAY GENE’ STUDI

RultsSexual Aroal of Male TwsWe predicted that heterosexual male tws show stronger sexual rpons to the other sex, whereas their homosexual -tws rpond more strongly to the same sex. Heterosexual male tws had more genal aroal to the other sex, and their homosexual -tws showed more aroal to the same sex. Panel A picts 5 heterosexual tws and their 5 homosexual -tws, and panel B picts 94 unrelated heterosexual men and 97 unrelated homosexual men.

Panel A picts 6 heterosexual tws and their 6 homosexual -tws, and panel B picts 123 unrelated heterosexual men and 136 unrelated homosexual men. For tws, penncy of data was acunted for by cludg pairs as a random size imageSexual Aroal of Female TwsWe predicted that heterosexual female tws show siar sexual rpons to both sex, but their homosexual -tws rpond more strongly to the same sex. Their homosexual female -tws also showed genal aroal to the same sex and other sex, each pared wh basele, although somewhat ls so for the latter, p = 0.