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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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firemonkey firemonkey
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11 years ago
Human gene frequencies for the ABO blood group vary by geographic region. Type A is found in 50% of the genes in Australian aborigines, 30% in Blackfoot Indians, and absent among natives of South America. Type B is the rarest throughout the world with the highest occurrence in Central Asia at 30%. No blood type has a selective advantage over another. Based on this information, what can you infer about the evolution of the human species?
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#1
11 years ago
This isn't evolution, it's just change of allele frequencies over time. Evolution requires an increase of information through mutations, that's not what is happening here. It is just change in allele frequencies of already present information. No new information coming about.

Now to answer your question directly,
This is an example of genetic drift and isolation so some alleles are not in the populations or are rarely in the populations.
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#2
11 years ago
"This isn't evolution, it's just change of allele frequencies over time"

I sincerely hope this is a poe.  The definition of evolution IS a change in allele frequencies over time...
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