细胞分裂后期染色体加不加倍我看中国的高中生物书的话,细胞分裂后期染色体数目加倍,但我看这里的话,没有写着加倍,到底是怎么搞的呢?AnaphaseTwoeventsthenoccur:first,theproteinsthatbindsisterch

Question

细胞分裂后期染色体加不加倍
我看中国的高中生物书的话,细胞分裂后期染色体数目加倍,
但我看这里的话,没有写着加倍,到底是怎么搞的呢?
Anaphase
Two events then occur:first,the proteins that bind sister chromatids together are cleaved,allowing them to separate.These sister chromatids,which have now become distinct sister chromosomes,are pulled apart by shortening kinetochore microtubules and move toward the respective centrosomes to which they are attached.Next,the nonkinetochore microtubules elongate,pulling the centrosomes (and the set of chromosomes to which they are attached) apart to opposite ends of the cell.The force that causes the centrosomes to move towards the ends of the cell is still unknown,although there is a theory that suggests that the rapid assembly and breakdown of microtubules may cause this movement.[16]
These two stages are sometimes called early and late anaphase.Early anaphase is usually defined as the separation of the sister chromatids,while late anaphase is the elongation of the microtubules and the chromosomes being pulled farther apart.At the end of anaphase,the cell has succeeded in separating identical copies of the genetic material into two distinct populations.

Answer 1

细胞分裂后期时着丝点分裂,染色体一分为二,所以数目暂时加倍,随着细胞质的分裂,染色体又回到了原来数目