首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA str
We all know that DNA has the ability to identify individuals but, because it is inherited, there are also regions of the DNA str
admin
2010-08-07
16
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 break-through 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 George Green, a member of the BYU Molecular Genealogy research team.
The possible research of family trees is based on the fact that______.
选项
A、genetics has achieved a breakthrough
B、genetic information contained in DNA can be revealed now
C、each individual carries a unique record of who 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
语义题。基于第一段第二、三句,我们知道遗传标记提供独有的识别特征把人们连接在一起,形成家族树。换句话说,能对家族树进行研究,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这个人与他人之间的关系。所以正确答案为C。
转载请注明原文地址:https://kaotiyun.com/show/Obxd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Whichofthefollowinglawisrelatedtoeducation?TheschooldistrictislikelytobeallofthefollowingEXCEPT
Menhaveahardtimeadmittingfailurebecause______.Ifmendonotdroptheirdefensemechanismsandtellthetruth______.
Menlietowomen.Attheheartofmanymen’slies,however,isthemaleego.Menlietobuildthemselvesuportoconcealsometh
ThecontroversialAnglo-Frenchsupersonictransportplane,theConcorde,hadattractedmuchattentionbecauseitisunusuallylo
【B1】ThefreeenterprisesystemhasproducedatechnologycapableofprovidingtheAmericanconsumerwiththelargestandmostva
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplegotogetaneducation.Nevertheless,ithasbeensaid
Americanschoosetheirpresidentonthe______.
Morethan30,000driversandpassengerswhoseatinthefrontofthevehiclesarekilledorseriouslyinjuredeachyear.At
Morethan30,000driversandpassengerswhoseatinthefrontofthevehiclesarekilledorseriouslyinjuredeachyear.At
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelife【21】______commontoallanimals.Inabio
随机试题
小蒋是一位中学教师,在教务处负责初一年级学生的成绩管理。由于学校地处偏远地区,缺乏必要的教学设施,只有一台配置不太高的PC可以使用。他在这台电脑中安装了MicrosoftOffice,决定通过Excel来管理学生成绩,以弥补学校缺少数据库管理系统的不足。
抗菌药物的不合理应用表现在诸多方面
A.巯基酶失活B.细胞色素氧化酶失活C.胆碱酯酶失活D.二氢叶酸还原酶失活E.环化酶失活金属中毒的机制是可使
女,78岁。因剧烈心前区疼痛6小时不缓解,急诊心电图提示广泛前壁心肌梗死。查体:BP100/60mmHg,呼吸急促,30次/分,口唇发绀,双肺底闻及细小水泡音,心率120次/分,心尖区第一心音减弱,可闻及舒张期奔马律。最可能的诊断是
锅炉压力容器定期检验时,以()为主,必要时才增加()方法。
关于气体的可缩性和膨胀性特点说法错误的是()。
《金融机构反洗钱规定》自()起施行。
供应商的企划与物流管理情况认证的内容主要有()。
关于成语或俗语所揭示的声学、热学现象,下列表述错误的是()。
A、邻居B、同事C、父子D、不认识D
最新回复
(
0
)