单项选择题

If two men suspected for some reason that 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

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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 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

单项选择题

Which of the following CAN NOT be inferred from the passage

A．We are a walking, living, breathing record of our ancestors.
B．Many American slaves did not know who their ancestors were.
C．An adopted child generally lacks enough information to prove his identity.
D．Molecular Genealogy can be used to prove a relationship between individuals.