Q. The F2-generation offspring in a plant showing incomplete dominance, exhibit
A) Variable genotypic and phenotypic ratio
B) a genotypic ratio of 1 : 1
C) a phenotypic ratio of 3 : 1
D) Similar genotypic and phenotypic ratio of 1 : 2 : 1
Explanation
In incomplete (partial or intermediate) dominance, the effect of dominant allele is diluted or modified, so that the phenotypic expression of the concerned trait in a hybrid is distinguishable from both parental type. Consequently, both phenotypic and genotypic ratios in F2-generation are 1 : 2 : 1.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.