单项选择题

National Academy of Sciences has the opinion that ______.

A．DNA testing should be systematized
B．only authorized laboratories can conduct DNA testing
C．the academy only is authorized to work out standards for testing
D．the academy has the right to accredit laboratories for DNA testing

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热门试题

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

单项选择题

DNA fingerprinting can be unreliable when ______.

A．the methods used for blood-cell calculation are not accurate
B．two different individuals of the same ethnic group may have the same DNA fingerprinting pattern
C．a match is by chance left with fingerprints that happen to belong to two different individuals
D．two different individuals leave two DN samples