The 9:3:3:1 ratio is obtained
A) through a dihybrid cross in which the genes are linked on the same chromosome.
B) through a dihybrid cross in which the genes are on different chromosomes.
C) when crossing over occurs.
D) in a test cross.
E) None of the above

Question

Quizplus · Accepted Answer

The 9:3:3:1 ratio is obtained through a dihybrid cross in which the genes are on different chromosomes. This means that the two traits being studied are independently assorted during meiosis, resulting in four possible gametes with equal frequency: AB, Ab, aB, and ab. When these gametes combine in a dihybrid cross, the resulting offspring will exhibit the 9:3:3:1 phenotypic ratio.

The 9:3:3:1 Ratio Is Obtained