A和a为控制果蝇体色的一对等位基因,只存在于X染色体上。通常情况

Aa为控制果蝇体色的一对等位基因,只存在于X染色体上。通常情况下,发生该等位基因分离的细胞是……………(  

A.初级精母细胞   B.精原细胞   C.初级卵母细胞      D.卵细胞

答案

C

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