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
44
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.
【B10】
选项
答案
that are present in our DNA and that we share with others today.
解析
转载请注明原文地址:https://kaotiyun.com/show/hPu7777K
0
大学英语四级
相关试题推荐
PresidentRichardNixonusedtosaythatthefirstcivilrightofeveryAmericanistherighttobefreefromdomesticviolence.
A、Setmarketrulesandimplementactuallaws.B、Protectthefinancialinterests.C、Improvetheefficiencyofthemacro-controlp
Doctorsandresearchershavebeguntolookforcausesofoverweightinacriticalperiodoflife—theninemonthsbeforebirth.R
Lonelinesshasbeenlinkedtodepressionandotherhealthproblems.Now,astudysaysitcanalsospread.Afriendofalonelyp
A、Signuptomoveinrightaway.B、Addyournametothewaitinglist.C、Gotoasksomeoneattheapartments.D、GototheOff-cam
Housingofficialssaythatlatelytheyarenoticingsomethingdifferent:studentsseemtolackthewill,andskill,toaddresst
A、Themancanonlygetafreerepairwithinthreemonthsofhispurchase.B、Thecassetteplayerisguaranteedforhalfayear.C
Wanthappier,better-adjustedkids?Paylessattentiontothem,so【C1】______afamilycoachDavidCode.Hesaysfamiliescentered
Forthispart,youareallowed30minutestowriteashortessayentitledOnCollegeStudents’RentingHousesOutsideCampus.Yo
A、Inahotel.B、Atadinnertable.C、Inthestreet.D、Attheman’shouse.A
随机试题
()是婴儿的一种常见病,多在六个月左右发生。
下列哪项不是急性肾炎的临床特征
水肿的调摄护理最为重要的是
使用牙挺时,牙挺的挺刃一般应插入牙槽嵴的
(2008年)面积相等的两个图形分别如图5—25(a)和图5—25(b)所示。它们对对称轴y、z轴的惯性矩之间的关系为()。
工程勘察报告《不良地质作用和特殊性岩土的描述和评价》中特殊岩土主要包括()。
错账更正的主要方法有()。
设函数f(x)连续,下列变上限积分函数中,必为偶函数的是().
软件生命周期中花费时间最多的阶段是()。
A、I’msorry.Idon’tknow.B、I’mstillthinkingaboutit.C、I’mgladaboutit.A此句意为:对不起,请问去火车站怎么走?肯定的应答应具体告知怎么走,否定的应答可说“对不起,我不
最新回复
(
0
)