Question

Dogs that have purebred parents of different breeds are very popular. Pomchis have one Pomeranian parent and one Chihuahua parent. Labradoodles have a Labrador retriever parent and a poodle parent. Crossbred dogs are hybrids and have a combination of traits from both parents’ breeds.What genotypes would the labradoodle parents have?

A. homozygous
B. purebred
C. heterozygous
D. F1 generation

Answer 1

The genotypes of the Labradoodle parents would depend on the specific traits that are being considered and whether they are dominant or recessive.

If the trait being considered is controlled by a single gene with two alleles, and both parents are purebred for different alleles (i.e. one parent has two copies of the dominant allele and the other has two copies of the recessive allele), then the parents would be heterozygous for that trait.

For example, if we consider the trait of coat color and assume that black is dominant and white is recessive, and one parent is a purebred black Labrador Retriever (BB) and the other parent is a purebred white Poodle (bb), then the Labradoodle parents would be heterozygous (Bb) for coat color.

So, the answer is C. heterozygous.