Which of the Following Crosses Would Produce a 3:1 Ratio

Question

Which of the following crosses would produce a 3:1 ratio of phenotypes in the next generation?
A) AA × AA
B) AA × aa
C) Aa × Aa
D) Aa × aa
E) aa × aa

Accepted Answer

The 3:1 phenotype ratio is typical of a monohybrid cross between two heterozygous individuals (Aa × Aa) where one allele is dominant and the other is recessive.