下列有关xy型性别决定的叙述正确的是 A.含x的配子数∶含y的配子数=1∶1 b.xy型性别决定的生物y染色体都比x染色体短小 c Template




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tomski下列有关xy型性别决定的叙述正确的是 a.含x的配子数∶含y的配子数=1∶1 b.xy型性别决定的生物y染色体都比x染色体短小 coloring