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
2024-02-28
36
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(私生)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 corms 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(家谱) 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 ease we can look primarily at the Y chromosome (染色体))," explains Ugo A. Perego, a member of the BYU Molecular Genealogy research team. [br] The possible research of family trees is based on the fact that ______.
选项
A、genetics has achieved a breakthrough
B、genetic information contained DNA can be revealed now
C、each individual carries a unique record of whom he is and how he is related to others
D、we can use DNA to prove how distant an individual is to a family, a group or a population
答案
C
解析
基于第一段第二、三句,我们知道遗传标记提供的独有的识别特征(unique identification)把人们连接在一起,形成家谱。换句话说,能对家谱进行研究,是因为遗传标记的独有特征可以用来判断一个人的基因身份以及与他人之间的关系,C项正确。A“遗传学取得突破”和B“包含在DNA中的基因信息现在可以揭示出来”没有回答进行家谱研究依据什么基础这样的问题;而D项强调“用DNA证明有多远(how distant)”与文章相悖。
转载请注明原文地址:https://tihaiku.com/zcyy/3489589.html
相关试题推荐
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
随机试题
[originaltext]W:Oh,Jack.I’mgladIcaughtyou.IwanttotellyouIhaveto
消防联动控制器采用独立的手动控制单元,每个控制单元通过直接连接的导线和控制模块对
()项不是产品型业务,销售收入金额直接预测方法。A.毛利法 B.产品计划法
组胺中毒特点不正确的是A.发病缓慢 B.恢复快 C.症状轻 D.体温变化不
A.8 B.2 C.16 D.4
行为描述面试的假设前提为( )。A.属于一种特殊的结构化面试 B.面上的问题
根据《行政强制法》,行政机关应当及时作出解除查封、扣押决定的情形有()。A.行
工程质量缺陷可分为()。A.施工前的质量缺陷 B.施工过程中的质量缺陷
施工质量保证计划内容包括:明确质量目标以及()。A.确定组织机构 B.质
企业现金管理的目标是()的平衡。A.满足预防性需要和投机性需要 B.保证资产
最新回复
(
0
)