Question

the allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents?
25 percent
50 percent
75 percent
100 percent

Explanation:

Step1: Define alleles

Let \(C\) represent the allele for curly hair and \(c\) represent the allele for straight hair. The mother is \(CC\) (homozygous curly) and the father is \(cc\) (homozygous straight).

Step2: Determine gametes

The mother can only produce \(C\) gametes. The father can only produce \(c\) gametes.

Step3: Use Punnett square

When we cross \(CC\times cc\), all offspring will have the genotype \(Cc\). In incomplete dominance, the \(Cc\) genotype shows a phenotype that is a blend (exhibits characteristics of both parents, like wavy hair which is a blend of curly and straight).

Answer:

100 percent