A cross between two true-breeding strains (P₀ generation) with genotypes A/A;b/b and a/a;B/B results in an F₁ genotype of A/a;B/b. If this is test-crossed to a/a;b/b, which of the following offspring have parental phenotypes?
Please select all that apply.

Question

Quizplus · Accepted Answer

Parental strains are those in the parental (P₀) generation. A/a;b/b has the same phenotype as the first parent (A/A;b/b) and a/a;B/b has the same phenotype as the second parent (a/a;B/B). The remaining two offspring have phenotypes that differ from both parents and are termed recombinants.

A Cross Between Two True-Breeding Strains (P0 Generation) with Genotypes

A Cross Between Two True-Breeding Strains (P₀ Generation) with Genotypes