同性恋性行为由多种基因和环境共同

 zuijinzheixiangfabuzai《kexueyanjiu》zazhiqikanshangdekexueyanjiucheng，genjuduijin50shuwanrendeyichuanxinxipouxixiajielun，shentizhongbingmeiyoudanyihuadeshuobaile“ tongxinglian jiyin”。

中国台湾举行大规模同性恋游行

 yijuqiangdiao，tongxingxingxingweizaoshouyichuanjiyinheziranhuanjingdexianghuweihai，bingqiezheiyiyichuanjiyinbingbushizhideshidanduyichuanjiyin，yebingbushihaoduoge，zhishixuduoyichuanjiyin，yinermeifafenzhegerendetongxingxingxingweidechansheng。

 juyingguoguangbogongsi(bbc)8yue30ribaodao，gaikexueyanjiuyingyonglemeiguoweishengwujinrongjigoujin40.9wanrenyu23andme(yingguobenrendnapingdingqiye)chaochu6.85shuwanrendeyichuanjiyintongjishuju。

中国台湾举行大规模同性恋游行

 yuhuirenyuanbeiwendaoshibushitongxinghuoban，jiqishibushiyouyixingpengyouairen。tebiezhuyideshi，suoshukexueyanjiudefangweizhongshiduiyu“tongxingxingxingwei”zheiyigerenxingweizishen，bingfei“tongxinglian”zheiyizhenshishenfen。

 zhenduikeyanchengguo，bbccheng，meiguohafodaxuehemashengligongdaxuedekexueyanjiugongzuorenyuanxiajielun，dangkaolvdaoquanbujiyinzushi，jiyinyichuanyaosusuozaochengweihaidezhanbiwei8-25%。

 jumeiguo《weibao》baodao，kexueyanjiugongzuorenyuangongfajuele5zhongxianshixinxichuyutongxingxingxingweiyoubijiaoxianzhudelianluodedanhegansuanduotaixing( snps)——erzhongzainanshihenvshizhongchangyoufajue，erzhongjinzainanshizhongfajue，zheizhongjinzainvshizhongfajue。

 gaikexueyanjiugongzuozujuede，jinzainanshizhongfajuedezheizhongjianghuicanjiacijisudiaozheng，youyutayunanshitutouxiangguan。dansuoshusnpszhikeyixiangtongxingshenghuochushibushang1%debiaoshu。