chromatids in mitosis & meiosis

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poorstudent
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chromatids in mitosis & meiosis

Post by poorstudent » Wed Oct 22, 2008 11:48 pm

The last question of an assignment I have is making me go crazy so if someone has time to see if my answers are correct it would be much appreciated :]

A normal diploid human cell has 23 pairs of chromosomes. It also has 23 pairs of chromatids, & usually 1 chromosome consists of 1 chromatid. After DNA synthesis, the cell now has 92 chromatids (23 pairs = 26 x 2 = 92). Those chromatids are stuck together, so there are still 23 pairs of "chromosomes", each chromosome now consisting of 2 chromatids.

a) How many CHROMATIDS will that cell have in metaphase of mitosis ? I guessed 46, but that can`t be right...

b) How many chromatids will one daughter cell have after mitosis is complete ? I thought 23 ?

c) How many would one daughter have in METAPHASE II of meiosis ? I thought 46 ?

d) How about after meiosis is complete ? I thought 23 ?

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mith
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Post by mith » Wed Oct 22, 2008 11:51 pm

make sure whether you're specifying pair or non paired
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr

poorstudent
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Post by poorstudent » Thu Oct 23, 2008 1:13 am

Oh no =( Well did I get the numbers right ?

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