1.    Seventy percent of a population have the dominant trait while 30% are recessive.  What percentage of the population are carriers?

A. q2 = 0.30, therefore the recessive allelic frequency is q = 0.55

B. p + q = 1
    p = 1 - 0.55
    p = 0.45 - dominant allelic frequency

C.
Genotype Designation  Frequency Percent
Homozygous Dominant pp or p2 (0.45)2 = 0.21 21%
Heterozygote pq  2(0.55)(0.45) = 0.49 49%
Homozygous Recessive qq (0.55)2 = 0.30 30%
Forty nine percent of the population are carriers.

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