$A$ dihybrid condition is represented by:

Which law is demonstrated by Mendel's dihybrid cross?

In a cross between yellow round $(YYRR)$ and green wrinkled $(yyrr)$ pea plants,find out the ratio between seeds having yellow and green seed colour in the $F_{2}$ generation.

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.

What is the phenotypic ratio of a test cross in the $F_1$ generation of a dihybrid cross?

In Mendel's dihybrid cross,what is the proportion of the dominant homozygous plants in the $F_2$ generation (in $/16$)?