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stages in the cell cycle

Genetics as it applies to evolution, molecular biology, and medical aspects.

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stages in the cell cycle

Postby Hudson » Sun Mar 13, 2011 7:13 pm

Hello.. It appears I'm stuck on another question. I've figured out 3/4 of it, but I can't seem to find ANYWHERE in my textbook, anything about the stages of the cell cycle and cancer. If you can help me, that would be great.

Which stage or stages of the cell cycle do the following statements refer to?


G0 STATE a. Cells usually arrest here when they stop dividing.
G2 b. Chromosomes are visible.
S PHASE c. Chromosomes are doubled for the whole stage.
G1, S, G2 d. The stage(s) included in interphase


_________ e. Cells usually leave this stage(s) when they become cancer cells.
I have no idea?!! Any assistance would be muchly appreciated!

Thanks everyone!
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Re: stages in the cell cycle

Postby DRT23 » Wed Mar 16, 2011 9:37 am

Hello,

G2 b. Chromosomes are visible.


Chromatides are condensed in prophase sub-stage of M (mitosis) phase of cell cycle. Thus, chromosomes are visible in M.

_________ e. Cells usually leave this stage(s) when they become cancer cells.


The answer is G0. Because, cancer cells divide like normal cells do. But, they aren't controlled properly so, they accumulate mutations in genome. However, they are more active in terms of dividing and are rarely quiescent and arrested in G0.
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