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
48
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.
【B3】
选项
答案
maintained
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
Tell-AllGenerationLearnstoKeepThingsOfflineMinLiu,a21-year-oldliberalartsstudentattheNewSchoolinNewYork
A、Husbandandwife.B、Friends.C、Strangers.D、Colleagues.A本题考查人物关系。对话中女士提到,Ann曾经告诉过她男士的职业,男士又说,AnnandIarereadyforachange
Memoryisourmostimportantpossession.Withoutmemory,youwouldn’tknowwhoyouare.Youcouldn’tthinkaboutthepastorplan
A、Itisboring.B、Itiscrazy.C、Itisinteresting.D、Itisconfusing.C观点态度题。女士问男士有没有卜过新来的英语老师的口语课,男士回答说他真不知道这位新老师用了什么办法,让课堂气氛如
HowExerciseMakesYouSmarterExercisedoesmorethanbuildmusclesandhelppreventheartdisease.Newscienceshowsthat
WhySmallCompaniesWillWininThisEconomyIjustheardastoryfromaclientthat’shardtobelievebuttrue.Inthe
Theoceanshavealwaysservedasasinkforcarbondioxide,buttheburningoffossilfuelssincethebeginningoftheindustria
A、Children.B、Adults.C、Oldpeople.D、Peopleofallages.D事实细节题。短文中提到,各个年龄阶段的人都喜欢ShelSilverstein的诗歌和故事。
A、Theymightopenthebranchoffice.B、Theymightsignanotherthreecontracts.C、Theymightworkforforeigncountries.D、They
ThismaycomeasnosurprisetoresidentsofNewYorkCityandotherbigurbancenters:Livingtherecanbebadforyourmental
随机试题
“我爱咱们的国家,可是谁爱我呢?”在《茶馆》中说出这句台词的人物是()
法洛四联症包括
下列哪项不属于疥疮的临床特点()
下列关于施工合同的变更,不正确的是( )。
甲公司2016年初到2017年末期间创造了一项无形资产自己使用,无形资产的研究费用为200000元,开发阶段符合资本化的支出为250000元。2018年初开始申请专利,专利注册费为7200元,专利有效期为10年,采用年限平均法摊销无形资产成本。20
R图的控制下限()。
作为保护动物的丹顶鹤和大熊猫,主要栖息地和保护地是在()。
在招聘人事专员的过程中,关于劳动人事制度和法令的面试题属于()问题。
①每年清明节期间,新茶初出,最适合参斗②斗茶,即比赛茶的优劣,又名斗茗、茗战,始于唐、盛于宋,是古代有钱有闲人的雅玩③斗茶的场所,多选在有规模的茶叶店,前后二进,前厅阔大,为店面;后厅狭小,兼有厨房,便于煮茶④在古代,斗茶可谓风靡一时,如同西班牙斗牛
下列小题使用如下数据表:学生(学号(C,8),姓名(C,6),性别(C,2),出生日期(D)选课(学号(C,8),课程号(C,3),成绩(N,5,1))插入一条记录到“选课”表中,学号、课程号和成绩分别是“09080001”、“001”和80,正确
最新回复
(
0
)