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
40
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.
【B2】
选项
答案
pairs
解析
转载请注明原文地址:https://kaotiyun.com/show/XPu7777K
0
大学英语四级
相关试题推荐
PresidentRichardNixonusedtosaythatthefirstcivilrightofeveryAmericanistherighttobefreefromdomesticviolence.
PoorpeoplehaveIQ’ssignificantlylowerthanthoseofrichpeople.The【S1】______traditionalwisdomhasbeenthatthisisinla
PoorpeoplehaveIQ’ssignificantlylowerthanthoseofrichpeople.The【S1】______traditionalwisdomhasbeenthatthisisinla
Lonelinesshasbeenlinkedtodepressionandotherhealthproblems.Now,astudysaysitcanalsospread.Afriendofalonelyp
HowExerciseMakesYouSmarterExercisedoesmorethanbuildmusclesandhelppreventheartdisease.Newscienceshowsthat
Farewell,Libraries?Amazon,corn’srecentannouncementthatsalesofe-booksattheonlinemegastorehadovertakensalesof
Computersareelectronicmachinesforprocessingdata.Dataarepiecesoritemsofinformationthathavebeenproperly【C1】______
___________(幸亏遇到一位好心的出租车司机),Amyarrivedatthetestroomintime.
随机试题
擦伤的特点是
关于口腔颌面部解剖特点下列哪项是错误的
肺心病的首要死亡原因是:
抢救急性肺水肿病人吸氧时。湿化颅内乙醇浓度是多少
以下各项中属于专门为投资者买卖人民币特种股票而设置的账户是()。
张某拟与王某、赵某共同投资设立甲有限责任公司(简称甲公司),因张某不愿以自己名义投资,遂与李某约定,李某为名义股东,张某实际出资并享有投资收益。后李某按照约定,认缴出资100万元,设立了甲公司。李某被记载于甲公司股东名册,并在公司登记机关登记。王某、赵某认
毛泽东对“实事求是”这句话作了科学解释的著作是()。
衣服:布料
《周礼》
Americansusemanyexpressionswiththeword"dog".PeopleintheUnitedStateslovetheirdogsandtreatthemwell.【B1】______H
最新回复
(
0
)