polar body

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serene
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polar body

Post by serene » Tue Oct 21, 2008 2:30 am

Hi,

I'm a little bit confused by this question "If the sperm nucleus of animal X has 100 picograms of DNA, about how many picograms of DNA would you expect to find in the second polar body from a female animal?"

I thought the answer was 25 picograms but its actually 100 and I'm not sure why. Any help would be greatly appreciated.

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canalon
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Post by canalon » Tue Oct 21, 2008 1:59 pm

Your animal genome contains 2n chromosomes. The nucleus of the sperm therefore contains n chromosomes, or 100 pg DNA (in your exercise).
Look at the number of chromosome during the meiosis, and that will tell you how many chromosomes there are in each cell/polar body and calculate the amount of DNA
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)

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