首页
登录
职称英语
We all know that DNA has the ability to identify individuals but, because it
We all know that DNA has the ability to identify individuals but, because it
游客
2025-03-06
7
管理
问题
We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA strand which can relate an individual to his or her family(immediate and extended), tribal group and even an entire population. Molecular Genealogy(宗谱学)can use this unique identification provided by the genetic markers to link people together into family trees. Pedigrees(家谱)based on such genetic markers can mean a breakthrough for family trees where information is incomplete or missing due to adoption, illegitimacy or lack of records. There are many communities and populations which have lost precious records due to tragic events such as the fire in the Irish courts during Civil War in 1921 or American slaves for whom many records were never kept in the first place.
The main objective of the Molecular Genealogy Research Group is to build a database containing over 100,000 DNA samples from individuals all over the world. These individuals will have provided a pedigree chart of at least four generations and a small blood sample. Once the database has enough samples to represent the world genetic make-up, it will eventually help in solving many issues regarding genealogies that could not be done by relying only on traditional written records. Theoretically, any individual will someday be able to trace his or her family origins through this database.
In the meantime, as the database is being created, molecular genealogy can already verify possible or suspected relationships between individuals. " For example, if two men sharing the same last name believe that they are related, but no written record proves this relationship, we can verify this possibility by collecting a sample of DNA from both and looking for common markers(in this case we can look primarily at the Y chromosome(染色体)," explains Ugo Perego, a member of the BYU Molecular Genealogy research team. [br] If two men suspected for some reason they have a common ancestor, ______.
选项
A、we can decide according to their family tree
B、we can find the truth from their genetic markers
C、we can compare the differences in their Y chromosome
D、we can look for written records to prove their relationship
答案
B
解析
事实细节题。题干的表述相当于第三段第二句的if two men sharing the same last namebelieve that they are related,解题依据是定位句的后半句we can verify this possibility bycollecting a sample of DNA from both and looking for common markers通过采集两个人的DNA样本,寻找共同的遗传标记的方法来确定这种可能性,选项B符合这个意思。
转载请注明原文地址:https://tihaiku.com/zcyy/3984583.html
相关试题推荐
A:Youlookunhappy.【D1】______B:Oh,justbecauseofmyparents.Theyarealway
A:Youlookunhappy.【D1】______B:Oh,justbecauseofmyparents.Theyarealway
A:Youlookunhappy.【D1】______B:Oh,justbecauseofmyparents.Theyarealway
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’re
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’re
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’re
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’re
Everyoneseemstoknowthatgrandma’scookiestastebetterbecausethey’re
Thefatherlosthis______justbecausehissonfoughtagainwithothersinschool
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
随机试题
MemoTo:AlltheStaffFrom:Mr.Mendels,thePe
【B1】[br]【B3】[originaltext]RecentlyagroupofSwedishresearchscientists
Forthispart,youareallowed30minutestowriteanoteofapologytoyour
幼儿的户外活动时间在夏、秋季可安排多一些,冬季可适当缩短。一般每天的户外活动时间
青蒿抗疟有效成分有()。A.青蒿素B.青蒿素甲C.青蒿素乙D.青蒿素醚E.青蒿
城市低收入住房困难家庭的情况实行动态管理,由市、县政府( )向社会公布一次。A
决定经济增长的直接因素包含以下()。A.投资量 B.劳动量 C.技术进
根据《民法典》规定,导致合同无效的情形包括()。A.权利义务显失公平 B.以
谵妄的临床表现不包括 A.定向力丧失B.对各种刺激无反应C.意识模糊D.感
下列关于税收执法特征的说法,正确的有()。A、具有单方面的意志性 B、具有被动
最新回复
(
0
)