edancer98
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?
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edancer98
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My brain is crying.
DrAmaQueen
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haha
edancer98
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Can you help me? :)
DrAmaQueen
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but the chromosomes do not have to be identical e.g in men, there are two sex gametes, paired together X and Y gamete
InYourHead
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@DrAmaQueen
Do you mean to say that human gametes have 23 chromosomes?
DrAmaQueen
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or rather i would say that each chromosome in the pair is a gamete
DrAmaQueen
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they have 23 pairs
InYourHead
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Body cells have 23 pairs of chromosomes.
That's 46 in all.
DrAmaQueen
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yeah, 44 autosomes and 2 sex chromosomes
edancer98
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Thankyou both. :)
DrAmaQueen
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works the same for animals, don't know about plants don't do botany lol
DrAmaQueen
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anytime
InYourHead
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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??
Determined
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Yes I am thinking what it was.
A1A2 and B1B2.
DrAmaQueen
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yeah 2 pairs means four in all
Determined
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If we assume A1 and A2 represent the homologous chromosomes.
DrAmaQueen
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then meiotic division brings it down to a pair
edancer98
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I'm surrounded by smart people.
InYourHead
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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.
edancer98
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dats ok
DrAmaQueen
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:P
DrAmaQueen
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now that i look at it ...........
DrAmaQueen
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in a diploid cell, there would be twice the normal number gametes
Determined
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edancer98 do you get how to do this question?
DrAmaQueen
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haha christ!!!
DrAmaQueen
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sorry correction
edancer98
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I did then it got complicated with too many answers so I'm thinking. :/ Gonna scroll up.
DrAmaQueen
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the 23 pairs of chromosome in a haploid cell make a single gamete
edancer98
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Ok think I got it. Thanks everyone. :D
DrAmaQueen
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we made a mountain out of a mole hill
edancer98
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haha yup. I'll probably post another question later. xP I'll close this one.
Determined
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Ok then, as you have got it I'll leave this here for reference.
Determined
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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.
Determined
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But the question did say combinations so yeah.
DrAmaQueen
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the question is confusing, am not even sure what they are asking for, could you rephrase it?
edancer98
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I can't that was the whole question. :(
edancer98
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Normally I love biology but this is insane.
DrAmaQueen
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ok lets take it slow
DrAmaQueen
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how many different combinations of chromosome
edancer98
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Two pairs of homogous chromsomes.
DrAmaQueen
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in the gamete, the chromosome would be paired in fours(2 pairs)
edancer98
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yes
edancer98
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lol this only took 30 minutes for me to get it xP
DrAmaQueen
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haha
DrAmaQueen
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homologous means that the 2 chromosomes in a pair would have the same genetic material
edancer98
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uh huh
DrAmaQueen
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in a haploid cell, there are 22 homologous pairs, cause the last pair which is the sex chromosome pair is not homologous
DrAmaQueen
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so in a diploid cell, i would assume there are 44 homologous pairs
edancer98
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TAHNKYOU! What is your IQ? :O
DrAmaQueen
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like 2 :D
edancer98
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lol it's clearly higher than mine since I just typed thankyou wrong
DrAmaQueen
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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
edancer98
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hahahaha XD I better close this question now
Ammarah
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Hi(:
Ammarah
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help me study:(
DrAmaQueen
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ok, i will study for 2
Ammarah
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what ever girlll or should i say grill! lol im so stressed right now.....
InYourHead
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So stressed we can't even read powerpoints right anymore.
Ammarah
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lol yeah
Ammarah
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hey inyourhead...i dont get slide 103