In what kind of classic Mendelian cross would you expect to find a ratio of 9:3:3:1 among the F₂ offspring? A) monohybrid cross B) dihybrid cross C) testcross D) None of the choices is correct.

Question

Quizplus · Accepted Answer

A dihybrid cross involves crossing individuals that differ in two traits/genes. The 9:3:3:1 ratio is a classic result expected in a dihybrid cross between two heterozygous parents (AaBb x AaBb), where the offspring inherit dominant alleles for both traits (9), dominant allele for one trait and recessive allele for the other (3:3), or recessive alleles for both traits (1).

In What Kind of Classic Mendelian Cross Would You Expect