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
74
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
PoorpeoplehaveIQ’ssignificantlylowerthanthoseofrichpeople.The【S1】______traditionalwisdomhasbeenthatthisisinla
PoorpeoplehaveIQ’ssignificantlylowerthanthoseofrichpeople.The【S1】______traditionalwisdomhasbeenthatthisisinla
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglargenumbersofanimalsinsmallspaces.Perhapsthegre
A、Manypeopleregarditasaprivilege.B、Mostpeoplethinkhealthcareasaright.C、Theythinkthepublicshouldfundit.D、Th
A、Itisfullofdeliciousbead.B、Itlooksveryserious.C、Itisfullofcolorfulballoons.D、Itiscoveredwithpaintings.C细节
IcecreambecamepopularinFranceinthe1500s,butonlyamongroyalty.Overthenextfewcenturies,theprocessofmakingthem
A、Theirhardwork.B、Theirbadtemper.C、Theirlivingenvironment.D、Theirproductionofhoney.C短文中阐述了实验最初很成功,但随后提到了这种杂交蜜蜂引起了严重
A、Thewomanthinkshehasanoverduebook.B、Thebooksheneedshavebeencheckedoutbysomeoneelse.C、Thewomanisunableto
Foxesandfarmershavenevergotonwell.Thesesmalldog-likeanimalshavelongbeenaccusedofkillingfarmanimals.Theyare
Whenhearrived,hefound______theagedandthesickathome.
随机试题
简述行政环境常见的类型。
房颤常见的病因是
已知平面简谐波的方程为y=Acos(Bt-Cx),式中A、B、C为正常数,此波的波长和波速分别为()。
某市为加强消防安全,准备在城市中心选址安排一个标准消防站,目前有A、B、C三个选址方案(如图3所示)。【问题】试对这三个选址方案进行分析,并确定选址方案(不需要考意用地规模的问题)。
硫酸铵化肥,以每袋5公斤包装
王某于2010年8月20日应聘到甲公司工作,订立了为期5年的劳动合同,约定从事管理岗位工作和月工资为4000元等事项。劳动合同还约定公司给予其社会保险补贴,不再为其缴纳社会保险费。2014年6月10日,王某以甲公司未依法缴纳社会保险费为由提出解除劳动合同,
下列哪些权利要求的撰写符合规定?
如右图,一个矩形里面内接一个正三角形,正三角形中内接一个圆,圆内又内接一个三角形。已知矩形面积为24平方厘米,那么最里面小三角形的面积是多少?
下列()属于民族自治地方的自治权。
Anewhigh-performancecontactlensunderdevelopmentatthedepartmentforappliedphysicsattheUniversityofHeidelbergwill
最新回复
(
0
)