Q. In a monohybrid cross involving incomplete dominance, the phenotypic ratio equals the genotypic ratio in $F_{2}$- generation. The ratio is
A) 3 : 1
B) 1 : 2 : 1
C) 1 : 1 : 1 : 1
D) 9 : 7
Explanation
In case of incomplete dominance, when pink flowers of F1-generation, are self-pollinated, they develop red (RR), pink (Rr) and white(rr) flowers in the ratio 1 : 2 : 1, respectively, genotypically as well as phenotypically. Genotypic ratio−RR : Rr : rr 1 : 2 : 1 Phenotypic ratio−Red : Pink : White 1 : 2 : 1
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.