题目

 From childhood, Bob was different and never seemed to fit in. Bob did complete college, married his loving wife, Evelyn and was grateful to get his job as a copywriter at Montgomery Wards during the Great Depression. Then he was blessed with his little girl, Barbara. But it was all short-lived. Evelyn was diagnosed with cancer and the disease stripped them of all their savings and then Bob and his daughter were forced to live in a two-room apartment in the Chicago slums. Evelyn died just days before Christmas in 1938.Bob struggled to give hope to his child, for whom he couldn't even 某哺乳动物的基因型为AABbEe,如图是其一个精原细胞在产生精子细胞过程中的某个环节的示意图,据此可以判断( ) A.图示细胞为次级精母细胞,细胞中含两个染色体组B.该精原细胞产生的精子细胞基因型有ABe、aBe、AbEC.图示细胞中,a基因来自于基因突变或基因重组D.三对基因的遗传遵循自由组合定律
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