Question

question 10
1 pts
if the d allele is completely dominant over the d allele, what percentage of the offspring will have the dominant phenotype when two heterozygous individuals mate?
50 percent
100 percent
75 percent
25 percent

Explanation:

Step1: Determine the genotypes of the parents

Heterozygous individuals have the genotype \(Dd\).

Step2: Create a Punnett square

	\(D\)	\(d\)
\(d\)	\(Dd\)	\(dd\)

Step3: Calculate the proportion of offspring with the dominant phenotype

Genotypes \(DD\), \(Dd\) show the dominant phenotype. There are 3 out of 4 possible genotypes (\(DD\), \(Dd\), \(Dd\)) that show the dominant phenotype. The proportion is \(\frac{3}{4}= 0.75\) or \(75\%\).

Answer:

75 percent