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Common Mushroom Tissue

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Common Mushroom Tissue

Postby A5HLEY » Sat Feb 23, 2008 9:41 pm

Hi guys, I just have a quick question.

My question is:
A common mushroom (that you would purchase in a grocery store) mostly consists of tissue that is:
a) haploid
b) diploid
c) in the heterokaryon phase
d) in the phylym Zygomycetes
e) in the same phylum as angiosperms

I was leaning towards C, but I'm not really sure...

Thank you for your help!
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Postby MrMistery » Sun Feb 24, 2008 7:19 pm

here's a hint: the majority of tissue can be either haploid or diploid. So the answer is either A or B. Both can't be wrong.
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Postby Cat » Mon Feb 25, 2008 1:47 am

A5HLEY, you answered correctly.

MrMistery, you are incorrect in case of mushrooms. Technically heterokaryons are neither haploid (they have 2n/cell) nor diploid (two nuclei => not a single genome).
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Re: Common Mushroom Tissue

Postby MrMistery » Mon Feb 25, 2008 1:35 pm

That is true: the heterokaryon stage is a special case, if you want to call it that. I see nothing wrong with calling a keterokaryon diploid, but as the majority of books make the distinction, i accept it. However, the keterokaryon is a transient stage(pardon the word, some fungi retain this stage for many years) in the sexual reproduction of a fungus.

The fungus body, the mycelium, is haplod. Here is a nice picture of the life cycle of a fungus. From Biology 7th edition, Campbell and Reece
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Postby Cat » Mon Feb 25, 2008 6:49 pm

Just to clarify: "mushroom" is the fruiting body that is produced by sexual reproduction of fungi during heterokaryon stage.
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Postby MrMistery » Wed Feb 27, 2008 7:30 am

I stand corrected. I didn't read the initial question thoroughly and answered another question
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