The production of gametes by the parents, the formation of zygotes the $F_1$ and $F_2$ plants, can be understood using

Genes which code for a pair of contrasting traits are known as ……..

If a plant heterozygous for tallness is selfed, the $F_2$ generation has both tall and dwarf plants. This proves the principle of

How does inheritance of one Gene take place ?

If a pea plant is represented by $Rr$, what type of information is obtained