Suppose That Eye Color Is a Single Gene Trait and That

Multiple Choice

Suppose that eye color is a single gene trait and that brown eyes is a dominant allele and blue eyes is a recessive allele. If Mark has brown eyes, we would know:

A) that Mark is heterozygous for the eye color trait
B) that Mark is homozygous for the eye color trait
C) Mark's genotype
D) Mark's phenotype