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General Biology: Mitosis and Meiosis help?

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General Biology: Mitosis and Meiosis help?

Postby scrnnamepending » Wed Oct 14, 2009 3:12 pm

Having some major trouble figuring out this question:

In the orchid Vanilla phaeantha, a diploid cell in G1 contains an average 15 pg of DNA spread among 32 chromosomes. Please answer the following questions about this plant:

A diploid cell in prophase should have a total of ____15___ pf of DNA, ___64____ chromatids, and ____32_____ chromosomes.

A diploid cell that is in early mitotic anaphase should have ___15___ pg of DNA and ___32_____ chromosomes.

A cell in early anaphase I should have ___15____ pg of DNA and ___32____ chromosomes.

A cell in early anaphase II should have ___7.5___ pg of DNA and _______ chromosomes.

As you should remember, plants have an alternation of generations. In angiosperm like this orchid the pollen grain is really a haploid plant with several nuclei. Each G1 nucleus should have ____7.5____ pg of DNA and ________ chromosomes.

The egg nucleus should have ______ pg of DNA and _______ chromosomes.

I filled in what I got so far...not sure if it's correct but based off what I read in the book that's what I came up with.
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Postby JackBean » Thu Oct 15, 2009 5:23 am

If 15 pg is in 32 chromosomes, in how many chromosomes will be 7.5 pg?

(both egg and pollen are haploid)
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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