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
2025-03-03
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] People in a large area may possess the same DNA thread because________.
选项
A、DNA is characteristic of a region
B、they are beyond doubt of common ancestry
C、DNA strand has the ability to identify individuals
D、their unique identification can be provided via DNA
答案
B
解析
逻辑推断题。题干的意思是短文第一句中there are also regions of the DNA strand“也有一些区域的人具有同样的DNA链”的意译,原因就是前面提到的because it is inherited“DNA具有遗传性”,既然是遗传,那么可以推断出具有同样DNA特征的人必定有相同的祖先。比较四个选项,B符合这样的意思。
转载请注明原文地址:https://tihaiku.com/zcyy/3981537.html
相关试题推荐
She________thewashingoutinthegardenbecauseitwasfineyesterday.A、hung
He’sonlygotoneshirtbecausealltherest________beingwashed.A、istobeB、i
Becauseofthepoorharvest,wheatpriceshave_________inthelastsixmonths.
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
Wasitbecausehewasill________heaskedforleave?A、soB、whenC、whyD、thatD本题
________thetrafficjam,wewouldhavecaughtourtrain.A、ButforB、Becauseof
Idon’tliketodisturbyou,becauseyou’requitetired______today.A、ofB、with
______therain,wewouldhavehadapleasanttriptothecountryside.A、Becauseo
随机试题
简述个案护理研究过程的步骤
下列属于进行多种产品保本分析的方法有()。A.加权平均法 B.联合单位法
目前个人住房贷款的形式主要有()。A.住房公积金贷款 B.抵押贷款 C.
未取得营业执照,擅自销售商品房的,由( )以上人民政府工商行政管理部门按照相关
请从所给的四个选项中,选出最恰当的一项填入问号处,使之呈现一定的规律。 A.如
当代环境伦理学是一个富有开放性和包容性的新科学,形成了多种理论模式和学说。这些模
职业分类的特征包括()。A.目的性 B.社会性 C.稳定性 D
丙企业是一家生产和销售重型机械的企业。为推动科技创新,丙企业所在地政府于2×15
现代通信接入网中的几种典型接入技术为()。A、铜缆接入 B、HFC接入
以下不是产前筛査常用方法的是A(PAPPA)和游离β-HCG B.AFP、
最新回复
(
0
)