Answer:
The frequency of the recessive allele is C: 0.3.
Explanation:
According to Hardy-Weinberg, the allelic frequencies in a locus are represented as p and q, referring to the allelic dominant or recessive forms. The genotypic frequencies after one generation are p² (Homozygous dominant), 2pq (Heterozygous), q²(Homozygous recessive). Populations in H-W equilibrium will get the same allelic frequencies generation after generation. The sum of these allelic frequencies equals 1, this is p + q = 1.
In the exposed example, the genotypic frequency for homozygous recessive individuals (q²) in the population is aa = 9% = 0.09
This is the proportion or frequency of the recessive genotype in a population, denoted as (aa) that equals q².
Allelic frequency for the trait is a, wich equals q. And as we know the genotypic frequency, aa or q², we need to calculate the sqare root of this value: √a² = √0.09 = 0.3
This is the proportion of a specific allele, a, respect to the pool of alleles. Results are expressed in proportions, so the sum of every allelic frequency for one locus equals one.
