If two pairs of genes are represented by $AA, Bb$,what are the possible gametic combinations after meiosis?

The Mendel dihybrid phenotypic ratio is . . . . . . .

$A$ human male produces four types of gametes $AB, Ab, aB,$ and $ab$ in equal proportions. What is the corresponding genotype of this individual?

In peas,tallness is dominant over dwarfness and red colour of flowers is dominant over the white colour. When a tall plant bearing red flowers was pollinated with a dwarf plant bearing white flowers,the different phenotypic groups were obtained in the progeny in numbers mentioned against them:
Tall,Red $= 138$
Tall,White $= 132$
Dwarf,Red $= 136$
Dwarf,White $= 128$
Mention the genotypes of the two parents and of the four offspring types.

The phenotypic ratio in the $F_{2}$ generation of a dihybrid cross is

From a cross $AABb \times aaBb$,the genotypes $AaBB : AaBb : Aabb : aabb$ will be obtained in the following ratio: