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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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rld09009 rld09009
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12 years ago
I know what it means but I don't know how it impacts allele frequencies. If I get a good answer I will report a ten!!
Ty so much!!
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wrote...
#1
12 years ago
Alleles that give an organism a better chance of survival in their environment, better chance of reproduction, will become more frequent in a population.
EX.
There are dark and light moths in an environment. A factory is erected nearby and the environment becomes darker due to soot. The darker moth's alleles for darker pigments will be naturally selected, bc they have a better chance of surviving and reproducing.
wrote...
#2
12 years ago
Natural selection can increase the frequencies of alleles if they are advantageous to a species' survival and reproductive abilities.  If they somehow produce a phenotype that is not a selective advantage, their frequency will decrease.

The change in allelic frequencies is one way of defining evolution.  A population evolves as "better" alleles increase in frequency in the gene pool.
wrote...
#3
12 years ago
BY environmental variations or natural mutations
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