OpenStudy (hdrager):

If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?

1 year ago
OpenStudy (miracrown):

How many do you think?

1 year ago
OpenStudy (hdrager):

I know there are 10 but I need help in figuring out why.

1 year ago
OpenStudy (miracrown):

Ok let me explain it to you ...

1 year ago
OpenStudy (miracrown):

So meiosis. Do you understand what happens in anaphase?

1 year ago
OpenStudy (hdrager):

it's when the sister chromatids pair up and the cell is starting to split apart. Each end has the same complete set of chromosomes

1 year ago
OpenStudy (miracrown):

Yes, exactly, but here they are speaking about meiosis I. In meiosis I, there are homologous chromosomes that line up together first

1 year ago
OpenStudy (miracrown):

So here we have 20 chromosomes, 10 from dad (blue) and 10 from mom (green). In the first step of meiosis, the cell splits apart the homologous chromosomes, not the chromatids...

1 year ago
OpenStudy (miracrown):

So we get one set going to each side like this.... (see attachment)

1 year ago
OpenStudy (miracrown):

So how many chromosomes does each daughter cell get here?

1 year ago
OpenStudy (hdrager):

Ohh jeeze okay I understand now

1 year ago
OpenStudy (hdrager):

Thank you so much I don't know why I was so stumped by that question

1 year ago
OpenStudy (miracrown):

No prob. Glad I could help! :)

1 year ago
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