Q. If a cross is made between AA and aa, the nature of F1-progeny will be
A) Genotypically AA, phenotypically a
B) Genotypically Aa, phenotypically a
C) Genotypically Aa, phenotypically A
D) Genotypically aa, phenotypically A
Explanation
If a cross is made between AA and aa, where A is dominant over a, then the nature of F1progeny will be genotypically Aa and phenotypically A. It means that the genotype of progeny will have both A and a but it will show the external appearance or character (s) regulated by gene A.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.