Question

George has dark colored eyes, blond hair, and no freckles. He mates with Susie who has blue eyes, dark hair and freckles. Susie's mother had blue eyes, blond hair and freckles and her father had dark eyes, dark hair and no freckles. The genes for these traits assort independently. The dominance relationships of the alleles are as follows:
    
     E = dark eyes         H = dark hair                    F = freckles
     e = blue eyes h = blond hair f = no freckles

a) What is the genotype of George?

b) What is the genotype of Susie?

Answer 1

a) The genotype of George is either EEhhff or Eehhff

b) The genotype of Susie is either eeHHFF or eeHhff

Since dark-coloured eyes are dominant over blues so the genotype of dark colour eyes of George is either homozygous or heterozygously dominant, rest of his phenotype is of recessive forms so it cannot be in heterozygous form. In the case of Susie, dark hair is dominant over blond hair so only this character can be either homozygous or heterozygous. Since each character is assorting independently, there 50% chance of each genotype.