Back
to top
aqa a level biology mitosis
Watch this threadPage 1 of 1
Go to first unread
Skip to page:
User148
Badges:
11
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
hi,
question 8aiii https://pmt.physicsandmathstutor.com...ll%20Cycle.pdf has me confused
so the mark scheme says that there will be 3 chromosomes
https://pmt.physicsandmathstutor.com...Cycle%20MS.pdf
I thought there'd be 4 because there are 4 chromosomes.
if structure a is a centromere, wouldn't the black one on the opposite side be a centromere too? that would mean there'd be 2 chromosomes in the gamete...?
Thanks
question 8aiii https://pmt.physicsandmathstutor.com...ll%20Cycle.pdf has me confused
so the mark scheme says that there will be 3 chromosomes
https://pmt.physicsandmathstutor.com...Cycle%20MS.pdf
I thought there'd be 4 because there are 4 chromosomes.
if structure a is a centromere, wouldn't the black one on the opposite side be a centromere too? that would mean there'd be 2 chromosomes in the gamete...?
Thanks
0
reply
phoenix_567
Badges:
5
Rep:
?
You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report
#2
So, the question is referring to how many chromosomes will there be in a gamete if this cell undergoes meiosis. Well as you know, a gamete needs to be haploid (has half the number of chromosomes) so if this cell (diploid-2n) undergoes meiosis the 4 daughter cells (gametes) will each have half the number of chromosomes than the diploid cell.
Therefore, this diploid cell has 3 pairs of chromosomes (3 black and 3 white) = 6 chromosomes. Half of 6 is 3 so the number of chromosomes in the gamete will be 3.
Btw the circle in the middle of the sticks is the centromere if you’re getting confused about that...
I hope this helps!
Therefore, this diploid cell has 3 pairs of chromosomes (3 black and 3 white) = 6 chromosomes. Half of 6 is 3 so the number of chromosomes in the gamete will be 3.
Btw the circle in the middle of the sticks is the centromere if you’re getting confused about that...
I hope this helps!
1
reply
X
Page 1 of 1
Go to first unread
Skip to page:
Quick Reply
