A brown dog crossed with a yellow dog produced 12 brown offspring. A second brown individual was obtained. When the yellow dog was crossed with this animal, six brown and six yellow offspring were born. Which of the following best explains the results of the second cross?

Question

Quizplus · Accepted Answer

The results of the second cross, where half of the offspring are brown and half are yellow, suggest that the yellow trait is recessive and the brown trait is dominant. This is because the yellow parent, being homozygous recessive, when crossed with a heterozygous brown (carrying one allele for yellow and one for brown), produces a 1:1 ratio of brown to yellow offspring.

A Brown Dog Crossed with a Yellow Dog Produced 12