An SSLP Is Located 2 Map Units Away from the X-Linked

An SSLP is located 2 map units away from the X-linked locus responsible for red-green color blindness.Three alleles of this SSLP are known: "4 repeats," "5 repeats," and "7 repeats." A woman with normal color vision,but whose father is color blind,marries a man with normal vision,and they have a son. $\begin{array}{|l|l|l|l}\hline \begin{array}{l}\text { Family } \\\text { member }\end{array} & \text { SSLP genotype } & \text { Family member } & \text { SSLP genotype } \\\hline \begin{array}{l}\text { Woman's } \\\text { father }\end{array} & \text { "5 repeats" } & \text { Woman's husband } & \text { "3 repeats" } \\\hline \text { Woman } & \begin{array}{l}\text { "5 repeats"/"7 } \\\text { repeats" }\end{array} & \text { Couple's child } & \text { "5 repeats" }\\\hline \end{array}$
Given the SSLP genotypes of the family members shown above,what is the probability that the couple's son is color blind?

A) 2%
B) 50%
C) 98%
D) 99%
E) 100%