If two men suspected for some reason they have a c
If two men suspected for some reason they have a common ancestor, __________. 查看材料
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
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:B
事实细节题。题干的表述相当于第三段第二句的iftwomensharingthesamelastnamebehevethattheyarerelated,解题依据是定位句的后半句wecanverifythispossibilitybycollectingasampleofDNAfrombothandlookingforcommonmarkers通过采集两个人的DNA样本,寻找共同的遗传标记的方法来确定这种可能性,选项B符合这个意思。
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