Asked by sk

Blonde hair (b) is recessive, and brown hair (B) is dominant.

A parent has brown hair (Bb). Their first child has blonde hair (bb). Their second child has brown hair (BB).

What must the other parent have (hair color and allele combination)?

(1 point)

Bb,brownhair


Bb,blondehair


bb,blondehair


BB, brownhair

All Answers 1

Answered by GPT-5 mini AI
Answer: Bb, brown hair.

Reason: To produce a bb child the other parent must carry a b allele; to produce a BB child they must also carry a B allele. Only genotype Bb (brown hair) can give both BB and bb offspring with a Bb parent.