Question

In a random mating population frequency of dominant allele is 0.7. What will be the frequency of recessive phenotype? and how.

Answer 1

Answer on Question #54557 – Biology – Genetics

Question:

In a random mating population frequency of dominant allele is 0.7. What will be the frequency of recessive phenotype? and how.

Answer.

The basic formulas:

$$p ^ {2} + 2 p q + q ^ {2} = 1 \text{ and } p + q = 1$$

p = frequency of the dominant allele in the population

q = frequency of the recessive allele in the population

p² = frequency of homozygous dominant individuals

q² = frequency of homozygous recessive individuals

2pq = frequency of heterozygous individuals

Thus, frequency of recessive allele: q = 1 - p = 1 - 0.7 = 0.3.

Frequency of recessive phenotype: q² = 0.3² = 0.09.

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