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A level Biology: Post your doubts here!

Autumn98

Autumn98

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anyone who did the bio paper 2 (22) 2015?
Do you remember what answers you wrote for the fill in the blanks on ecology lesson..
 
M

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Lola_sweet said:
Sis remember anaphase is the stage when the sister chromatids are being pulled apart by their keneticores connected to the spindle fibre
so it cant be Anaphase
Click to expand...
Yeah okay fine BUT in METAPHASE they arrange themselves at the equator..
They are more or less scattered in the figure..
 
Lola_sweet

Lola_sweet

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My Name said:
Yeah okay fine BUT in METAPHASE they arrange themselves at the equator..
They are more or less scattered in the figure..
Click to expand...

by now prophase is over and Prophase is a stage of mitosis in which the chromatin condenses into a highly ordered structure called a chromosome
thus its now getting ready to align at the equator of the cell
if it was anaphase it would look like this:
http://upload.wikimedia.org/wikipedia/commons/3/35/Anaphase.svg
 
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Lola_sweet said:
by now prophase is over and Prophase is a stage of mitosis in which the chromatin condenses into a highly ordered structure called a chromosome
thus its now getting ready to align at the equator of the cell
if it was anaphase it would look like this:
http://upload.wikimedia.org/wikipedia/commons/3/35/Anaphase.svg
Click to expand...
I get it that it can't be Anaphase but I though it can't be METAphase either because they'd be at the equator if they were...
Then I guess that its a little like Metaphase so metaphase:rolleyes:
 
Lola_sweet

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My Name said:
I get it that it can't be Anaphase but I though it can't be METAphase either because they'd be at the equator if they were...
Then I guess that its a little like Meta phase so metaphase:rolleyes:
Click to expand...

Yes :) tip is always cross off the ones it definitely cannot be
so here it cant be anaphase so A and B is definitely wrong
then u know the number of chromoses in the haploid cell cant be 10 because thats the number in the diploid cell
so D is definitely wrong :)
that leaves u with c :)
 
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Lola_sweet said:
Yes :) tip is always cross off the ones it definitely cannot be
so here it cant be anaphase so A and B is definitely wrong
then u know the number of chromoses in the haploid cell cant be 10 because thats the number in the diploid cell
so D is definitely wrong :)
that leaves u with c :)
Click to expand...
Yes thank you ^_^
 
qwertypoiu

qwertypoiu

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My Name said:
View attachment 54804
The answer is C how? I don't get the stage of mitosis part :3
Click to expand...
The cell has been squashed.
The line of chromosomes across the equator were forced into moving and becoming circular like that.
The principle being tested is the knowledge that chromatids have not separated yet in Metaphase, whereas they have in the Anaphase.
 
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qwertypoiu said:
The cell has been squashed.
The line of chromosomes across the equator were forced into moving and becoming circular like that.
The principle being tested is the knowledge that chromatids have not separated yet in Metaphase, whereas they have in the Anaphase.
Click to expand...
I dont get it. :/
What happens if they are squashed?
<I know that the number would be 5 so it can be either A or C >
 
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