Determine the likelihood of the birth of a fair-haired brown-eyed child in the family if both parents are brown-eyed

Determine the likelihood of the birth of a fair-haired brown-eyed child in the family if both parents are brown-eyed dark-haired heterozygous for both characteristics. it is known that brown eyes and dark hair are the dominant feature.

A-brown eyes
a-blue eyes
B-dark hair
b-blonde hair
R: ♀️AaBb * ♂️AaBb
G: AB, ab Ab, aB * AB, ab, Ab, aB
F1: AABB, 2ААВb, ААbb, 2АаВВ, 4АаВb, 2Ааbb, ааВВ, 2ааВb, ааbb.
Of these, 2 brown-eyed and blonde
Total 16
The probability of having brown-eyed and fair-haired children is 2/16 = 0.125%



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