Question

Some dogs bark when trailing; others are silent. The barking trait is due to dominant alleles. Erect ears (tall ears) are dominant to drooping ears (small ears). What kind of pups would you expect from a heterozygous, tall ear barker mated with a dominant small ear silent trailer.

Answer 1

When heterozygous erect beaker (AaBb) is mated with a droop silent trailer (aabb), the puppy will be a barker as the barker is dominant allele over the silent because silent one is recessive allele.