In the gene locus for eye colour in humans, the allele for brown eye is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of there parents’eye colour (Eye colour is not a sex linked trait)
-
A.
Both parents have blue eyes -
B.
Their father has blue eyes and their mother has brown eyes -
C.
both parents have brown eyes -
D.
Their mother has the blue eyes and their father has the brown eyes