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【单选题】
下图为雄性果蝇体细胞的染色体图解，其染色体组数为（）
A.
一
B.
二
C.
三
D.
四
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举报参考答案：
举一反三
【单选题】Genetic Testing Genetic testing is transforming medicine and the way families think about their health. As science uncovers the complicated secrets of DNA, we face difficult choices and new challenges...
A.
5 to 10 percent.
B.
10 percent.
C.
About 15 percent.
D.
5 percent.
相关题目：
【单选题】Genetic Testing Genetic testing is transforming medicine and the way families think about their health. As science uncovers the complicated secrets of DNA, we face difficult choices and new challenges...
A.
5 to 10 percent.
B.
10 percent.
C.
About 15 percent.
D.
5 percent.
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