Passage II

Each dog in a particular population has a black brown, or yellow coat. In this population, coat color is determined by 2 unlinked genes: Gene B and Gene E. Gene B has 2 alleles: B and b. Gene E also has 2 alleles: E and e. Table 1 shows the possible genotypes for Gene B and Gene E and the resulting coat color phenotypes.

Two of the dogs with black coats were crossed 3 times (Crosses 1-3). The coat colors of the offspring produced in each cross are shown in Table 2.

12. Suppose 2 of the offspring from Cross 3 with yellow coats are crossed. What percent of the resulting offspring will have yellow coats?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

Because according to table 1, the yellow coat must have the ee gene, so no matter what the specific genotype of Gene B is, the genotype of ee can only cross with each other, and the offspring can only be ee, then it must be yellow coat, so The probability is 100%