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
2023-07-27
34
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 Molecular Genealogy Research Group is building a database for the purpose of______.
选项
A、offering assistance in working out genealogy-related problems
B、solving many issues without relying on traditional written records
C、providing a pedigree chart of at least four generations in the world
D、confirming the assumption that all individuals are of the same origin
答案
A
解析
题干问的是建数据库的目的,对照第二段第四行中“help in solving many issues regarding genealogies that could not be done by relying only...(有助于解决仅靠……不能解决的与宗谱有关的许多问题)”。四个选项:A“解决与宗谱有关的问题时提供帮助”,正确;B“无须依赖传统文字资料解决许多问题”;C“提供代表世界基因构成的家谱”;D“获得10万份世界各地个人DNA样本”均不正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2873330.html
相关试题推荐
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
DowningStreetisthemostexclusivestreetinBritain,notbecauseitonlyha
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecaus
Becauseofherstrongdesireformaterialwealth,______(她急于进行权钱交易,根本不顾及对更大利益的破
Becauseofherstrongdesireformaterialwealth,______(她急于进行权钱交易,根本不顾及对更大利益的破
随机试题
[originaltext]W:IheardJanewasbadlyhurtinanaccident?M:Yes.Ifonlys
PASSAGEONEParadoxical.从第2段末句可知,一方面,摄影师们承认现代主义的成功所带来的艺术概念;但另一方面,他们又认为艺术性会破坏艺术的传统
色温以绝对温度(K)来表示,色温值越高,表示暖感越强;色温值越低,冷感越强、越柔
某施工企业在与其聘用的员工签订的劳动合同中约定,工伤事故导致人员死亡时最大赔偿额
半个多世纪以来,沃伦?巴菲特一直都恰到好处地把握了时机。对于这位传奇投资家,他的
净稳定资金比例指标包含的内容有( )。A.可用稳定资金 B.存贷比 C.所
衡量短期资产负债效率的核心指标是()A.净现金流量 B.净资产利息 C.净
美林时钟的投资策略主要是根据周期性、久期、汇率敏感性和标的资产四个方面做出判断。
区别泌尿系感染是新感染或是复发A.尿沉渣涂片找细菌 B.尿培养及菌落计数 C
对进入施工现场的钢筋取样后进行力学性能检测,属于施工质量控制方法中的( )。A.
最新回复
(
0
)