Final answer:
The value of q is 0.78 when the allele frequency p is given as 0.22. This is derived from the Hardy-Weinberg principle that states p + q = 1, hence q = 1 - p. The correct option is d. 0.22
Step-by-step explanation:
The question is asking to determine the value of q when the allele frequency p (for the dominant allele A) is given as 0.22. In a population genetics context, this refers to the Hardy-Weinberg principle, which states that in a genetically stable population, the allele frequencies p (frequency of the dominant allele) and q (frequency of the recessive allele) must add up to 1 (p + q = 1). Therefore, to find the value of q, we simply subtract the given p value from 1.
q = 1 - p
q = 1 - 0.22
q = 0.78
Therefore, the value of q when p = 0.22 is 0.78, which means that option b. 0.78 is the correct answer. This calculation is fundamental in population genetics to determine the frequency of alleles within a population and is critical for understanding the genetic diversity and evolution of species. The correct option is d. 0.22