Brian and Michael Are Brothers and They Both Inherited a Gene

Multiple Choice

Brian and Michael are brothers and they both inherited a gene for blue eyes. However, Brian's eyes are brown. How is that possible?

A) The genes that Brian and Michael inherited were corrupted in Brian's case.
B) Brian's genotype included genes for blue eyes only, but his eye color changed due to the lack of sunlight in his bedroom.
C) Michael's phenotype hides the fact that he inherited genes for brown eyes.
D) Brian's genotype included alleles for blue and brown eyes.