单项选择题

If two men suspected for some reason they have a common ancestor, ______.

A．we can decide according to their family tree
B．we can find the truth from their genetic markers
C．we can compare the differences in their Y chromosome
D．we can look for written records to prove their relationship
<上一题 目录 下一题>
热门 试题

单项选择题
The possible research of family trees is based on the fact that ______.
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
单项选择题
The Molecular Genealogy Research Group is building a database for the purpose of ______.
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 tile assumption that all individuals are of the same origin
相关试题