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)?
Both parents have blue eyes
Their father has blue eyes and their mother has brown eyes
both parents have brown eyes
Their mother has the blue eyes and their father has the brown eyes
Correct answer is C
No explanation has been provided for this answer.