猫是xy型性别决定的二倍体生物当猫细胞中存在两条或两条以上x染色体时只有1条x染色体上的基因能表达其余x染色体高度螺旋化失活成为巴氏小体 Template




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tomski猫是xy型性别决定的二倍体生物当猫细胞中存在两条或两条以上x染色体时只有1条x染色体上的基因能表达其余x染色体高度螺旋化失活成为巴氏小体 coloring