Tw pairs which at least one tw is homosexual were soliced through announcements the gay prs and personal referrals om 1980 to the prent. An 18-page qutnnaire on the "sexualy of tws" was filled out by one or both tws. Thirty-eight pairs of monozygotic tws (34 male pairs …
Contents:
- SCIENTISTS FD DNA DIFFERENC BETWEEN GAY MEN AND THEIR STRAIGHT TW BROTHERS
- YOUR GOOD HEALTH: WHY IS ONE ‘INTIL’ TW GAY, THE OTHER STRAIGHT?
- IS A PERSON ‘BORN GAY’, OR IS BEG GAY A LEARNED BEHAVR?
SCIENTISTS FD DNA DIFFERENC BETWEEN GAY MEN AND THEIR STRAIGHT TW BROTHERS
* if one twin is gay is the other also *
In fact, scientists recently intified two specific gen that appear to differ between gay and straight men [1]. For example, one may be straight while the other is gay. 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].
Homosexual orientatn tws: a report on 61 pairs and three triplet sets. Tw pairs which at least one tw is homosexual were soliced through announcements the gay prs and personal referrals om 1980 to the prent. 8% for homosexual orientatn.
YOUR GOOD HEALTH: WHY IS ONE ‘INTIL’ TW GAY, THE OTHER STRAIGHT?
Bee intil tws are always geilly intil, homosexualy nnot be geilly dictated. “No-one is born gay,” he not. “The predomant thgs that create homosexualy one intil tw and not the other have to be post-birth factors.” Dr. Whehead believ same-sex attractn (SSA) is ed by “non-shared factors,” thgs happeng to one tw but not the other, or a personal rponse to an event by one of the tws and not the other. * if one twin is gay is the other also *
4% for homosexual orientatn. Two sets ntaed a pair of monozygotic tws nrdant for sexual orientatn wh the third triplet dizygotic and disrdant for homosexual orientatn.
IS A PERSON ‘BORN GAY’, OR IS BEG GAY A LEARNED BEHAVR?
A third triplet set was monozygotic wh all three nrdant for homosexual orientatn. Homosexuals who are tws. Is homosexualy faial?
Human homosexualy: a paradigmatic arena for sexually antagonistic selectn? Fecundy of paternal and maternal non-parental female relativ of homosexual and heterosexual men.
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.