Abundance of cells in Metaphase

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ferbus
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Abundance of cells in Metaphase

Post by ferbus » Fri Jan 12, 2007 3:00 am

hey can anyone point me in the right direction for figuring out this question:

Suppose that you examined 100 cells in onion root tip squashes and obtained the following results:

STAGE NO. OF CELLS
Interphase..................................................62
Prophase....................................................12
Metaphase...................................................1
Anaphase...................................................11
Telophase..................................................14

Why is the number of cells showing the metaphase stage so low?

I know that the majority of the time cells are in interphase, but I can't find any information as to why a cell would be in metaphase only 1% of the time?

Thanks in advance!

Doc44
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Post by Doc44 » Fri Jan 12, 2007 5:52 am

Think about how specific the charactertics of metaphase are as compared to other phases.


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MrMistery
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Post by MrMistery » Fri Jan 12, 2007 1:26 pm

lol, cause metaphase is very short ;)
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sachin
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Post by sachin » Fri Jan 12, 2007 5:28 pm

some times end of prophase immediately leads to metaphase and ends up quickly.... and can be confused with anaphase....
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ferbus
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Post by ferbus » Sat Jan 13, 2007 3:16 am

thanks for all of the input

so if i'm understanding the replies - metaphase is usually not commonly seen because (1) it occurs quickly, (2) the conditions are very specific in order for metaphase to occur, (3) and sometimes metaphase can be confused with anaphase.

my issue with the replies:
i have no problem with the reply that states that it occurs quickly - but where did you find this info or how did you come to this conclusion?

if the conditions for metaphase to occur are that specific/ exclusive - then how could their be so many cells in the latter phases of mitosis (because my understanding of mitosis is that in order for anaphase and telophase to occur, a cell must pass through metaphase)?

Thanks again for the replies!

Doc44
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Post by Doc44 » Sat Jan 13, 2007 4:49 am

"i have no problem with the reply that states that it occurs quickly - but where did you find this info or how did you come to this conclusion?"

Many years of studying and teaching this. A textbook "Histology" by Hamm has a great section about animal cell mitosis.

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sachin
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Post by sachin » Sat Jan 13, 2007 6:10 am

ferbus wrote:thanks for all of the input

so if i'm understanding the replies - metaphase is usually not commonly seen because (1) it occurs quickly, (2) the conditions are very specific in order for metaphase to occur, (3) and sometimes metaphase can be confused with anaphase.

my issue with the replies:
i have no problem with the reply that states that it occurs quickly - but where did you find this info or how did you come to this conclusion?


Long setions of experiments........

ferbus wrote:if the conditions for metaphase to occur are that specific/ exclusive - then how could their be so many cells in the latter phases of mitosis (because my understanding of mitosis is that in order for anaphase and telophase to occur, a cell must pass through metaphase)?

Thanks again for the replies!


Simply; Anaphase and telophase are longer enough... :wink:
Senior Education Officer, BNHS, India. www.bnhs.org

Bitter Truth!
Who says reason for world war III will be Petrol?
Reason lies in two words "Me and Mine".

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