xplain y the chromosomes in the haploid cells r produced by meiosis I look different from those of meiosis II.

Question

Plz expalin

Answer 1

My guess is that you're using a book where the chromosomes are shown as an "X". What's important to remember is that an "X" is actually two chromosomes (sister chromatids) held together at their centromeres. So maybe it would be better to think of them as an ">" and a "<" that are joined at a single point. Each side is identical, since they are one chromosome that has replicated.

So in your orgininal cell, you would have a pair of replicated sister chromatids (>< ><). In Meiosis I, one group of the sister chromatids goes to one cell, and the other one goes to the opposite cell, so now you have two cells - (><) and (><). In Meiosis II, the sister chromatids split at the centromeres, and each goes into a separate cell, so now you've got four total cells (>)+(<)+(>)+(<).