有丝分裂有没有x y染色体,有丝分裂能产生精原细胞吗,与减数的区别,产生部位
推荐回答(1个)
有丝分裂有性染色体的存在。
精原细胞先通过有丝分裂增加精原细胞的数量,然后每个精原细胞再通过减数分裂形成4个成熟的精子.
比较项目 减数分裂 有丝分裂
发生部位 卵巢、睾丸 各种组织器官
分裂次数 2次 1次
子细胞名称 精细胞、卵细胞、极体 体细胞
染色体复制次数和时期 1次 间期 1次 间期
子细胞染色体数目变化 减半 不减半
联会、四分体 发生 不发生
非姐妹染色单体互换 发生 不发生
同源染色体分离 发生 不发生
着丝点分裂 发生 减Ⅱ后期 发生 后期
子细胞间的遗传组成 不一定相同 相同
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