某家庭父亲正常母亲色盲生了一个染色体为xxy的色觉正常的儿子产生这种染色体数目变异的原因可能是 A.胚胎�育的卵裂阶段出现异常 b.正常 Template




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tomski某家庭父亲正常母亲色盲生了一个染色体为xxy的色觉正常的儿子产生这种染色体数目变异的原因可能是 a.胚胎�育的卵裂阶段出现异常 b.正常 coloring