Question

which family members have red - green color blindness?
○ sam, tim, bella, and joshua
○ lisa and monica
○ ben, jenny, mike, carol, katie, and chris
○ sam, joshua, and tim

Explanation:

Red - green color blindness is an X - linked recessive disorder. Males with \(X^rY\) and females with \(X^rX^r\) have the disorder. Looking at the pedigree: Sam (\(X^rY\)), Tim (\(X^rY\)), Bella (\(X^rX^r\)), and Joshua (\(X^rY\)) have the genotypes associated with red - green color blindness.

Answer:

A. Sam, Tim, Bella, and Joshua