If a cross mode between AA and aa, progency will be:
Genotypically AA, phenotypically a.
Genotypically Aa, phenotypically a.
Genotypically Aa, phenotypically A.
Genotypically aa, phenotypically A.
Thus, genotypically Aa, but phenotypically dominant i.e. A.
If a cross mode between AA and aa, progeny will be:
In a dihybrid cross AABB × aabb, F2 progency of AABB, AABb, AaBB and AaBb accurs in ratio of________