Question

if a brown eyed man marriesa blue eyed woman and they have seven children,all of whom are browneyed.what is the fathers genotype?what are the genotypes of the children?

Answer 1

The father has to be homozygous for brown eyes(BB) if his children all have brown eyes. Since, the brown eye gene is dominant over blue eyes. All his children will be heterozygous for Brown eyes (Bb).