Question

question 3 of 10
color - deficient vision is a sex - linked recessive trait in humans. parents with
the following genotypes have a child:

what is the probability that the child will have color - deficient vision?

a. 0.50

b. 1.00

c. 0.25

d. 0.75

Explanation:

Step1: Determine gametes

The mother \(X^{R}X^{r}\) can produce \(X^{R}\) and \(X^{r}\) gametes. The father \(X^{R}Y\) can produce \(X^{R}\) and \(Y\) gametes.

Step2: Create Punnett square

	\(X^{R}\)	\(X^{r}\)
\(Y\)	\(X^{R}Y\)	\(X^{r}Y\)

Step3: Analyze genotypes

There are 4 possible genotypes. The color - deficient genotype is \(X^{r}Y\). The probability of \(X^{r}Y\) is \(\frac{1}{2}= 0.50\)

Answer:

A. 0.50