Question

Please Respond
Brown eyes (B) are dominant to blue eyes (b). Mr. and Mrs. Browne have three children with brown eyes and one child with blue eyes. Both Mr. and Mrs. Browne have brown eyes. What is the genotype for eye colour for Mr. and Mrs. Browne, and the genotype of their children. Show your working.


Mr. and Mrs. Browne phenotype:


Mr. and Mrs. Browne genotype:

Answer 1

Mr Browne and Mrs Browne has Bb genotype.

Because they have given that both have brown eyes and brown eyes are dominant over blue eyes.

children: Bb X Bb

X B b

B BB Bb

b Bb bb

so three children will have BB,Bb,Bb genotype but one child will have bb genotype.