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【单选题】

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 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. (80) There are many communities and populations which have lost precious records due to tragic s such as the fire in the courts during the Irish 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 ually 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 flora both and looking for common markers (in this case we can look primarily at the Y chromosome,' explains Ugo A. Perego, a member of the BYU Molecular Genealogy research team.
People in a large area may possess the same DNA thread because ______ .

A.DNA is characteristic of a region

B.
they are of common ancestry
C.
DNA has the ability to identify individuals
D.
their unique identification can be provided via DNA
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参考答案:
举一反三

【多选题】家谱图的功能()

A.
描绘家庭的结构
B.
解释家庭模式
C.
揭示家庭中可能的三角联系等关系模式
D.
规划治疗
相关题目:
【多选题】家谱的别称有()
A.
氏谱
B.
宗谱
C.
谱系
D.
族谱
【多选题】家谱图的功能()
A.
描绘家庭的结构
B.
解释家庭模式
C.
揭示家庭中可能的三角联系等关系模式
D.
规划治疗
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