2.下列有关人类的染色体性别决定等方面知识的叙述正确的是 A.性染色体上的基因只与性别决定有关b.性染色体只存在于精子或卵细胞中c.性 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )

tomski2.下列有关人类的染色体性别决定等方面知识的叙述正确的是 a.性染色体上的基因只与性别决定有关b.性染色体只存在于精子或卵细胞中c.性 coloring