Question

F₂ phenotypic ratio 1 : 2 : 1 is obtained in ______ dominance.

Answer 1

F₂ phenotypic ratio 1 : 2 : 1 is obtained in incomplete dominance.

Explanation:

F₂ phenotypic ratio 1 : 2 : 1 is obtained in incomplete dominance. In this type of dominance, neither allele is completely dominant over the other, leading to a hybrid phenotype that is intermediate between the two parent phenotypes. As a result, the F₂ generation shows a phenotypic ratio of 1 homozygous dominant : 2 heterozygous intermediate : 1 homozygous recessive, which matches the genotypic ratio as well.