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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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nursenerd nursenerd
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11 years ago
Recessive alleles becomes less and less present as people keep having kids with different races. Is it possible that eventually everyone will look the same?
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wrote...
#1
11 years ago
no because of crossing over the genes change
wrote...
#2
11 years ago
there is somthing called variation
nature will not let everyon elook the same
hk
wrote...
#3
11 years ago
It has been predicted; yes. Eventually redheads will be wiped out, then blondes, then pale skinned brunettes, according to the boffins. I'm interested in this sort of thing so keep me posted if you find something!
wrote...
#4
11 years ago
No. Because there is always a chance that two people with one dominant allele and one recessive will produce a recessive child.
Besides, it'll be quite a while before there is complete interracial marraige, if ever.
wrote...
#5
11 years ago
too many different combos, if so not for a very long, long time!
wrote...
#6
11 years ago
No that's not possible...
Even if there are less recessive alleles, there are still carriers who don't show the recessive allele, but still carry it.
wrote...
#7
11 years ago
Not really, for a couple of reasons:

[1] recessive alleles are, by definition, the ones that can be carried without being expressed. So there is limited selection pressure against them, and they take much longer to die out in a population

[2] Recessive alleles with no selective disadvantage will not be selected against in any case.

[3] there is a background rate of mutation that maintains the variety in the gene pool.
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