A genetic disorder is controlled by several genes. The effects of the alleles at these loci are additive. Assume that there is no environmental effect. For each locus, a capital letter in the genotype confers 4 units of risk. Each lower case letter confers 2 units of risk. Individuals with more than 25 risk units have the disorder.
Joseph has genotype Ee HH Nn Rr. Does Joseph have the disorder?
A. Yes
B. No
C. Cannot be determined
D. Carrier
