Population Genetics

By: Cathy

Dec 07 2010

Category: Biology, Evolution, Genetics

Professor Berry showed us several different population genetics charts in class. These usually have “generations” on the x axis and “% frequency of the allele on the y axis.”

For beneficial alleles, recessive alleles will increase in frequency slowly at first, but then become fixed (100% frequency in population). Beneficial yet dominant alleles, however, increase very quickly in frequency but plateau without reaching fixation. This is because the not-so-beneficial recessives can hide in heterozygotes without being expressed in the phenotype.

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