Question

2. A population of salamanders has two colors, blue and white. Blue is the dominant color and white is recessive. The frequency of the white allele is 36%. What percentage of the salamander population is white?​

Answer 1

The percentage of the white salamander population is 16%.

Hardy-Weinberg Equilibrium Equation

The genotypic frequencies within a population can be expressed by the binomial (p + q)² = 1, which can be developed and represented by the following equation:

• p² + 2pq + q² = 1

p = frequency of the dominant allele;

q = frequency of the recessive allele;

p² = frequency of the zygous dominant genotype;

2pq = frequency of the heterozygous genotype;

q² = frequency of the zygous recessive genotype.

Also according to the equation presented (p² + 2pq + q² = 1), we will have the following distribution of genotypes:

• CC = 0.36 = 36%
• Cc = 0.48 = 48%
• cc = 0.16 = 16%

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