Question

multiple choice question
in a population of 100 pea plants, 75% have purple flowers and 25% have white flowers. the purple flower allele is dominant over the white flower allele. if we use the value q to represent the frequency of the white flower allele in the hardy-weinberg equation, what is the correct value for q?
0.75
1.0
0.25
0.50

Explanation:

Step1: Identify the frequency of the recessive phenotype

The white - flowered plants are recessive. Given that 25% of the plants have white flowers, the frequency of the recessive phenotype \(q^{2}=0.25\).

Step2: Solve for \(q\)

Take the square root of \(q^{2}\). So, \(q = \sqrt{q^{2}}\). Substituting \(q^{2}=0.25\), we get \(q=\sqrt{0.25}\).

Answer:

\(0.50\)