Question

blonde hair (b) is autosomal recessive gene . a child with blonde hair has two partents with brown hair (B) . what must be the gene variants of both parents and why ?are any of the children heterozygous dominate? if so , what percentage ?

Answer 1

Both parents must be heterozygous and have a recessive allele in their allele pair that after merging will give a recessive homozygous pair.