首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
New Insight into the Roots of Homosexuality For an evolutionary biologist, homosexuality is something of a puzzle. It’s a co
New Insight into the Roots of Homosexuality For an evolutionary biologist, homosexuality is something of a puzzle. It’s a co
admin
2015-01-13
33
问题
选项
答案
New Insight into the Roots of Homosexuality For an evolutionary biologist, homosexuality is something of a puzzle. It’s a common trait, found in up to 10% of the population. It appears to be run in families, suggesting that it is hereditary, at least in part. And yet it defies the very reason why traits are passed on from generation to generation. How could something that hinders childbearing be passed down so frequently from parents to children? Researchers at the National Institute for Mathematical and Biological Synthesis think they may have an answer. It’s not in written in our DNA sequence itself, they suggest, which explains why scientists have failed so far to find "gay genes", despite intensive investigations. Instead, it’s written in how our genes are expressed: that is, in certain modifications to how and when DNA is activated. These changes can have environmental roots, so are not normally permanent enough to be passed from parent to child. But occasionally, they are.
解析
转载请注明原文地址:https://kaotiyun.com/show/g6HK777K
0
专业英语四级
相关试题推荐
Moderatedrinkingreducesstrokerisk,studyconfirms.Similartothewayadrinkortwoadayprotectsagainstheartattacks,m
Menandwomenapproachproblemswithsimilargoalsbutwithdifferentconsiderations.Whilemenandwomencansolveproblemsequ
AlthoughtheUnitedStateshasbeenshapedbycontinualwavesofimmigrants,Americanshaveoftenviewedimmigrationasaproble
WhentheJohnsonsmovedtoLondon,theyhadto______withsomeofthetreasuredfurniture.
Asimplecomputerprogramthatteacheschildrentodistinguishbetweensoundscandramatically(1)______theirlisteningskills.
Possessingacargivesamuchgreaterdegreeof______,enablingthedrivertomovearoundfreely.
Thevaseheboughtatthestreetmarketyesterdaywasa______forgery.
Therearereportsthatpupilsinsomeareaswere______toparticipateinwelcomeceremonies.
AsimplepieceofropehangsbetweensomeenvironmentallyfriendlyAmericansandtheirneighbors.Ononesidestandthosewhoha
Womenhavelongbeenmoreinnumberthanmenoncollegecampuses.Theyalsoholdmoreadvanceddegreesthantheirmale(1)______.
随机试题
InBritain,peoplehavedifferentaltitudestothepolice.Mostpeoplegenerally【21】themandthejobtheydo—althoughthereare
数学曲线拟合法中最简单、最常用的为()。
基础砌体基底标高不同时,应从低处砌起,并应由高处向低处搭砌,当设计无要求时,搭接长度不应小于:[2006年第25题]
《环境保护法》规定,建设项目中防治污染的设施,必须与主体工程()。
多层住宅中,单栋住宅的长度大于()m时应设4m宽、4m高的消防车通道,大于()m时应在建筑物底层设人行通道
借贷记账法的记账规则是“有借必有贷,借贷必相等”。()
企业在进行现金管理时,可利用的现金浮游量是指( )。
设z=3-x2y+
Thestreetisbeautiful,fortherearetreeson______.
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
最新回复
(
0
)