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
We inherit our DNA from our parents. DNA is shuffled, recombined and【B1】______from one generation to another. Each individual on
We inherit our DNA from our parents. DNA is shuffled, recombined and【B1】______from one generation to another. Each individual on
admin
2013-01-20
47
问题
We inherit our DNA from our parents. DNA is shuffled, recombined and【B1】______from one generation to another. Each individual on this earth received 23【B2】______of chromosomes from their parents(23 from dad and 23 from mom). Because DNA is【B3】______to a certain degree from one generation to the next, it is possible to【B4】______family lines by【B5】______specific markers.
The【B6】______of the Earth are more closely related than what it is generally thought. Today there are 6【B7】______people living on this planet. If we do some math, and we consider a generation to be about 25 years, 30 generations ago, every individual living today would have over 1 billion【B8】______ancestors. The estimated world population for the year 1250 AD was 400 million people.
This means that the number of actual ancestors for each individual is smaller than the number of possible ancestors and【B9】______.These common ancestors were able to transmit specific markers【B10】______.
The Molecular Genealogy Research Group is very interested in people with known genealogies【B11】______.Being 18 and older and having at least a four-generation pedigree chart are the only two qualifications in order to take part in this study.
【B9】
选项
答案
that we all start sharing from common ancestors within just few generations.
解析
转载请注明原文地址:https://kaotiyun.com/show/QPu7777K
0
大学英语四级
相关试题推荐
A、Visitherparents.B、Visithergrandma.C、Visitabeautifullake.D、Movenexttoalake.B行动计划题。男士问女士在七天的假期中有什么计划,女士说她会和父母一起去探
A、Removefoodlabels.B、Eatfoodshighinfiber.C、Lookforfoodshighinsalt.D、Weighyourselfeveryday.B题干询问诊所医生建议人们怎样去保持健康。
A、12.B、25.C、52D、600D细节辨认题。短文中明确提到,倩碧公司曾对600人进行过12次过敏性反应测试。
Doctorsandresearchershavebeguntolookforcausesofoverweightinacriticalperiodoflife—theninemonthsbeforebirth.R
A、Findoutacourse.B、Dropoffapaper.C、Gotoameeting.D、Seeanadviser.A选项中的Findout,Go,See等表明,本题可能考查行为动作。对话中男士说Oh,Ialmo
WhySmallCompaniesWillWininThisEconomyIjustheardastoryfromaclientthat’shardtobelievebuttrue.Inthe
A、Apainter.B、Adesigner.C、Awaiter.D、Anaccountant.B职业身份题。女士说他们对休息室的设计不满意,男士表示可以重新做一份设计图。由plansforthedrawingroom和prepar
A、Theyvaryextremelyindifferentlocations.B、Fewofthemareaffiliatedtocolleges.C、Theyhavethesamecharacteristics.D、
A、Howfaxmachinesgotalicense.B、Whoinventedfaxmachines.C、Howfaxmachinesdevelopedandworked.D、Wheretobuythefirst
ShouldBasicLivingSkillsBecomeCompulsoryatSchool?1.一些人认为基本生活技能也应该成为中国学生的必修课2.反对者则认为,学生应在家里逐步学习基本生活技能3.提出自己的观点
随机试题
中小型企业的企业经营战略层次包括()
此次火灾,________坏人有意纵火造成。[显然是]
关于Internet,下列说法正确的是
患者男,22岁。因急起全身不适,恶心,呕吐4个小时入院。患者呻吟不止,自述全身疼痛难忍,视物模糊。呈急性痛苦面容,坐立不安,躯体扭曲、颤抖,双手抱胸,流泪流涕,讲话口齿欠清,出汗较多,患者反复哀求医务人员给予止痛药物。对该患者目前需要重点询问和检查的内
患者,男,39岁。经常出现发作性眩晕,头痛,一过性肢体麻木及一时性言语謇涩。其最易引发的是
利用一元函数积分计算下列问题:求曲线y=sinx与y=x2-πx所围的平面图形面积;
在现代教育技术中,教学设计的关键设计任务是按()的先后顺序进行的。
吴某到郊区某家庭旅馆住宿,旅馆前台请他出示身份证办理人住手续,吴某拒不出示却强行要求入住,遂与旅馆工作人员发生争执并引发肢体冲突。旅馆工作人员报警后,该郊区派出所以扰乱公共秩序为由,决定对吴某处以300元罚款。对此,下列说法不正确的是()。(易错)
标准IP访问控制列表的基本格式为access-list[1istnumber][permit|deny][host/any][sourceaddress][wild-card-mask][log],请填写其参数描述。a、listnumber…
•ReadthefollowingextractfromanarticleaboutFrenchbankandanswerthequestions.•Foreachquestion15-20,markonelet
最新回复
(
0
)