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
2024-01-17
10
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/3370018.html
相关试题推荐
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseit
Idon’tliketodisturbyou,becauseyou’requitetired______today.A、ofB、with
Ifeelsurethat______qualification,abilityandexperience,youareabundantly
It’snouseringingmeupattheofficethisweekbecauseI’m______,A、bymyleav
It()measanuphillbattle,simplybecauseitisanawkwardandtime-consuming
Idon’tliketodisturbyou,becauseyou’requitetired()workinghardtoday.A、o
()I’mmistaken,I’veseenthatmanbefore.A、UnlessB、IfC、BecauseD、ProvidedA词
Thecollegesportsmeetwas()tillnextweekbecauseoftheheavyrain.A、putout
随机试题
[originaltext]Today’slecturewillconcerntheterritoryananimalclaims.Firs
A.气海 B.中极 C.关元 D.膻中 E.膏肓善于治疗气虚病证的腧穴是
断路器允许开断故障次数应写入变电站()。典型操作票$;$现场专用规程
在中国东部沿海部分地区,“用工荒”现象已出现多年。每年春节过后,几乎所有的劳动密
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
本案例体现了土地市场的()特点。A.区域性 B.权利主导性 C.低流动性
学生人均公用经费基本标准是如何制定的?
—般而言,价格波动幅度大且频繁的大宗初级商品可以作为期货合约的标的。()
共用题干 一般资料:求助者,女性,37岁,会计。案例介绍:求助者自述最近半年心
(2016年真题)变配电工程中,硬母线的连接方式应为()。A.扭纹链接
最新回复
(
0
)