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
32
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
Oneofthegoodthingsformeninwomen’sliberationisthatmennolongerhavetopaywomentheold-fashionedcourtesies.
EveryAprilIamtroubledbythesameconcern—thatspringmightnotoccurthisyear.Thelandscapelooksdull,withhills,skya
IsitanywonderthatAmericaisalsoacountryofdangerouslyoverweightpeople?AccordingtoarecentstudybytheNationa
IfyouwanttoknowhowIspendmymoney,gotoBlippy.com.EachtimeImakeapurchaseonmycreditcard,theamountI’vespent
AlthoughtheUnitedStateshasbeenshapedbycontinualwavesofimmigrants,Americanshaveoftenviewedimmigrationasaproble
Evidenceofthebenefitsthatvolunteeringcanbringolderpeoplecontinuestorollin."Volunteershaveimprovedphysicalands
MeredithJoneswasaschoolteacher,passionate,fluent,somethingofascholar,roughlygentle,ofremarkablevitalityandafrai
We’vejustinstalledtwoair-conditionersinourapartment,______shouldmakegreatdifferencesinourlifenextsummer.
Themanstopstotakehisdogoutsidetodoexercisebecause
Weare______gratefultoyouforyourwarmwelcomeandgracioushospitality.
随机试题
过去,很多中国消费者钟爱国外的小电子产品及手机。除了高科技含量外,很大程度上是因为其做工精良,令人________。但今天,无论手机还是小电子产品,国产品牌都已和国外品牌________。这背后,是“中国制造”水平的整体提升。依次填入画横线最恰当
论说文:根据下述材料,写一篇700字左右的论说文,题目自拟。从4月至今,瑞幸一路崩塌,曝出虚增22亿元销售额,股价暴跌、高管下课、两国调查。出生时含着金钥匙,满腔抱负;上市时被追捧为“中国的星巴克”,和国际品牌打擂台,志得意满;暴雷后被华尔街、监
如何正确处理改革、发展与稳定三者之间的关系?
就地浇筑梁(板)实测项目中,属于关键项目的是()。
背景资料:某城市桥梁工程,上部结构为现浇预应力钢筋混凝土箱梁。采用钻孔灌注桩基础,现浇承台、墩柱。跨越既有道路部分主桥跨度45m,主桥承台最大尺寸为:长8m,宽6m,高3m。桩身混凝土浇筑前,项目技术负责人到场就施工方法对作业人员进行了口头交底,随后立即
下面运算符的运算顺序正确的是()。
投资后管理中,股权投资基金获得被投资企业董事会席位后,可以()。
下图示意科隆群岛(加拉帕戈斯群岛)的地理位置。读图,完成以下题。科隆群岛特有动物种属比例较大。形成这一现象的地理条件是该群岛()。
下列有关“视觉文化”描述不正确的一项是()。文中[]应填入的词语是()。
材料11945年7月4日下午,毛泽东邀请从重庆到延安访问的黄炎培等人到他家里做客。黄炎培对毛泽东不无感慨地说:“我生六十多年,耳闻的不说,所亲眼看到的,真所谓‘其兴也勃焉’‘其亡也忽焉’,一人,一家,一团体,一地方,乃至一国,不少单位都没有能跳出
最新回复
(
0
)