Q. Some individuals with blood group –A may inherit the genes for blonde hair, while other individuals with blood group – A may the gene for brown hair. This can be best explained by the principle of
A) 3 : 1
B) 9 : 3 : 3 :1
C) 1 : 1
D) 1 : 1 : 1 : 1
Explanation
All the offsprings have different phenotypes. Therefore, the phenotypic ratio obtained by crossing rrTt and Rrtt is 1 : 1 : 1 : 1.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.