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
33
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.
【B8】
选项
答案
unique
解析
转载请注明原文地址:https://kaotiyun.com/show/LPu7777K
0
大学英语四级
相关试题推荐
OversleepingonSaturdayafterafewweeksoftoolittleshuteyemayfeelrefreshing,butitcangiveafalsesenseofsecurity.
A、Solopractice.B、Bigincome.C、Academicprize.D、Partnership.D事实细节题。短文以年轻的医生JeffreyBeckwith为例提到,他乐于寻求合作伙伴,而合作关系是他最看重的。即现代的年轻
IcecreambecamepopularinFranceinthe1500s,butonlyamongroyalty.Overthenextfewcenturies,theprocessofmakingthem
Doctorsandresearchershavebeguntolookforcausesofoverweightinacriticalperiodoflife—theninemonthsbeforebirth.R
Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,therefore,thechoiceofan【C1】______shouldbemade
Farewell,Libraries?Amazon,corn’srecentannouncementthatsalesofe-booksattheonlinemegastorehadovertakensalesof
A、Holdviolentprotests.B、Tiethemselvestotrees.C、Providemorejobs.D、Maketreesintopaper.B细节辨认题。对话中,男士给女士介绍说在塔斯马尼亚岛人们通过
A、TheatmospheresurroundingtheEarth.B、Waterfromoceansandlakes.C、EnergyfromtheSun.D、Greenhousegasesinthesky.C问题
A、Tomorrowwillbeagoodday.B、Theweathermanisgoodathiswork.C、Thestormwillgetworsetomorrow.D、Theweatherforecast
A、9:20.B、9:26.C、9:14.D、9:06.BW:Iwaiteduntil9:20foryou.M:Imusthavearrived6minutesafteryouleft.Q:Whattimed
随机试题
《国际货币基金协定》的主要内容包括()
假设按某种工艺生产的金属纤维的长度X(单位:mm)服从正态分布N(5.2,0.16),现在随机抽取15根纤维,测得它们的平均长度=5.3,如果总体方差没有变化,可否认为现在生产的纤维平均长度仍为5.2mm?(α=0.05)(附:u0.025=1.96)
护理学的4个基本概念是
女性淋病主要的感染部位是
A.组织接种单位销毁B.立即停止销售C.对该疫苗依法查封、扣押D.采取应急处置措施依照《疫苗流通和预防接种管理条例》的规定接到质量可疑疫苗报告的卫生主管部门应()
该租赁合同的性质属于()。若本案中双方未约定租赁期限,甲乙双方又无法就租赁期限协议补充,下列关于合同解除的说法正确的是()。
知图4—31所示斜面的倾角为θ,若要保持物块A静止,则物块与斜面之间的摩擦因数f所应满足的条件为()。
常见的金融风险类型包括()。
已知函数.f(x)=12/x+3x(x>0),则f(x)的最小值为________.
Obesityisanepidemictosomeandanopportunitytoothers.Morethantwo-thirdsofAmericansareoverweight.Findawaytobat
最新回复
(
0
)