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Biology 20 Online
OpenStudy (anonymous):

Really need help now please. :( A diploid cell has two pairs of homologous chromosomes. How many different combinations of chromosomes could there be in the gametes?

OpenStudy (anonymous):

My brain is crying.

OpenStudy (anonymous):

haha

OpenStudy (anonymous):

Can you help me? :)

OpenStudy (anonymous):

but the chromosomes do not have to be identical e.g in men, there are two sex gametes, paired together X and Y gamete

OpenStudy (anonymous):

@DrAmaQueen Do you mean to say that human gametes have 23 chromosomes?

OpenStudy (anonymous):

or rather i would say that each chromosome in the pair is a gamete

OpenStudy (anonymous):

they have 23 pairs

OpenStudy (anonymous):

Body cells have 23 pairs of chromosomes. That's 46 in all.

OpenStudy (anonymous):

yeah, 44 autosomes and 2 sex chromosomes

OpenStudy (anonymous):

Thankyou both. :)

OpenStudy (anonymous):

works the same for animals, don't know about plants don't do botany lol

OpenStudy (anonymous):

anytime

OpenStudy (anonymous):

That's right, in humans. 44 autosomes, 2 sex chromosomes. And you know that human gametes have half that number? ~~~~~~~~ I read the question. It says....a diploid cell has two pairs of homologous chromosomes. 2 pairs of homologous chromosomes.... as in FOUR chromosomes in all?? Like a spider mite??

OpenStudy (anonymous):

Yes I am thinking what it was. A1A2 and B1B2.

OpenStudy (anonymous):

yeah 2 pairs means four in all

OpenStudy (anonymous):

If we assume A1 and A2 represent the homologous chromosomes.

OpenStudy (anonymous):

then meiotic division brings it down to a pair

OpenStudy (anonymous):

I'm surrounded by smart people.

OpenStudy (anonymous):

lol So it really isn't talking about humans. A hypothetical question that happens to apply to spider mites. Funny. I'm sorry for misinterpreting it though.

OpenStudy (anonymous):

dats ok

OpenStudy (anonymous):

:P

OpenStudy (anonymous):

now that i look at it ...........

OpenStudy (anonymous):

in a diploid cell, there would be twice the normal number gametes

OpenStudy (anonymous):

edancer98 do you get how to do this question?

OpenStudy (anonymous):

haha christ!!!

OpenStudy (anonymous):

sorry correction

OpenStudy (anonymous):

I did then it got complicated with too many answers so I'm thinking. :/ Gonna scroll up.

OpenStudy (anonymous):

the 23 pairs of chromosome in a haploid cell make a single gamete

OpenStudy (anonymous):

Ok think I got it. Thanks everyone. :D

OpenStudy (anonymous):

we made a mountain out of a mole hill

OpenStudy (anonymous):

haha yup. I'll probably post another question later. xP I'll close this one.

OpenStudy (anonymous):

Ok then, as you have got it I'll leave this here for reference.

OpenStudy (anonymous):

Two pairs of homologous chromosomes: Let's call them A1 A2 and B1 B2. A1 could pair with B1 or B2 in the gametes - this means there are two combinations. A2 could pair with B1 or B2. That's another two. Therefore, there are four overall combinations. I guess recombination could give rise to more differences.

OpenStudy (anonymous):

But the question did say combinations so yeah.

OpenStudy (anonymous):

the question is confusing, am not even sure what they are asking for, could you rephrase it?

OpenStudy (anonymous):

I can't that was the whole question. :(

OpenStudy (anonymous):

Normally I love biology but this is insane.

OpenStudy (anonymous):

ok lets take it slow

OpenStudy (anonymous):

how many different combinations of chromosome

OpenStudy (anonymous):

Two pairs of homogous chromsomes.

OpenStudy (anonymous):

in the gamete, the chromosome would be paired in fours(2 pairs)

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

lol this only took 30 minutes for me to get it xP

OpenStudy (anonymous):

haha

OpenStudy (anonymous):

homologous means that the 2 chromosomes in a pair would have the same genetic material

OpenStudy (anonymous):

uh huh

OpenStudy (anonymous):

in a haploid cell, there are 22 homologous pairs, cause the last pair which is the sex chromosome pair is not homologous

OpenStudy (anonymous):

so in a diploid cell, i would assume there are 44 homologous pairs

OpenStudy (anonymous):

TAHNKYOU! What is your IQ? :O

OpenStudy (anonymous):

like 2 :D

OpenStudy (anonymous):

lol it's clearly higher than mine since I just typed thankyou wrong

OpenStudy (anonymous):

roflmfao it took a great deal of time to be sure of what they were even asking for, if i took that long in exam i would be sent to study agriculture

OpenStudy (anonymous):

hahahaha XD I better close this question now

OpenStudy (ammarah):

Hi(:

OpenStudy (ammarah):

help me study:(

OpenStudy (anonymous):

ok, i will study for 2

OpenStudy (ammarah):

what ever girlll or should i say grill! lol im so stressed right now.....

OpenStudy (anonymous):

So stressed we can't even read powerpoints right anymore.

OpenStudy (ammarah):

lol yeah

OpenStudy (ammarah):

hey inyourhead...i dont get slide 103

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