单项选择题

Before DNA fingerprinting is used, suspects ________.

A．would have to leave their fingerprints for further investigations
B．would have to submit evidence for their innocence
C．could easily escape conviction of guilt
D．could be convicted of guilt as well
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单项选择题
To geneticists like Lewontin and Hartl, the current method ________.
A．is not so convincing as to exclude the likelihood that two DNA samples can never come from two individuals
B．is arguable because two individuals of the same ethnic group are likely to have the same DNA pattern
C．is not based on adequate scientific theory of genetics
D．is theoretically contradictory to what they have been studying
单项选择题
The attitude of the Federal Bureau of Investigation shows that ________.
A．enough data are yet to be collected from various ethnic groups to confirm the unlikelihood of two DNA samples coming from two individual members
B．enough data of DNA samples should be collected to confirm that only DNA samples from the same person can match
C．enough data are yet to be collected from various ethnic groups to determine the likelihood of two different DNA samples coming from the same person
D．additional samples from various ethnic groups should be collected to determine that two DNA samples are unlikely to come from the same person
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