Question

You have a dog with a dominant black coat, but you want to determine if the dominant coat color is homozygous dominant or heterozygous. You can cross the dominant black dog with a _____ to determine the genotype of the dog.

a) Homozygous dominant dog
b) Heterozygous dog
c) Homozygous recessive dog
d) Codominant dog

Answer 1

To discern if a black coat is homozygous dominant or heterozygous in a dog, cross the dog with a homozygous recessive dog and observe the offspring's coat colors.

Step-by-step explanation:

To determine whether a dog with a dominant black coat is homozygous dominant or heterozygous, you can perform a test cross by crossing the dominant black coat dog with a homozygous recessive dog. If the black-coated dog is homozygous dominant, all offspring will have a black coat. However, if the black-coated dog is heterozygous, the offspring will show a 1:1 ratio of black coats to the recessive coat color since some will inherit the recessive allele.