题目

In many places in China,______bicycle is still________popular means of transportation. A.a;the B./;a C.the;a  D.the;the 答案:C已知某小麦的基因型是AaBbCc,三对基因分别位于三对同源染色体上,利用其花药进行离体培养,获得N株小麦,其中基因型为aabbcc的个体约占( ) A.N/4     B.0      C.N/16      D.N/8
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