Which of the following monohybrid ratios can describe incomplete dominance and codominance?
A) 2:1
B) 3:1
C) 1:3
D) 1:2:1
E) 4:1

Question

Quizplus · Accepted Answer

The 1:2:1 ratio can describe both incomplete dominance and codominance. In incomplete dominance, the heterozygous phenotype is intermediate between the homozygous dominant and homozygous recessive phenotypes, resulting in a 1:2:1 ratio. In codominance, both alleles contribute to the phenotype equally, resulting in a 1:2:1 ratio as well. The other ratios (2:1, 3:1, 1:3, and 4:1) do not accurately describe incomplete dominance or codominance.

Which of the Following Monohybrid Ratios Can Describe Incomplete Dominance