How many types of gametes are produced by a plant with the genotype $Rryy$?

In one of the hybridisation experiments,a homozygous dominant parent and a homozygous recessive parent are crossed for a trait. (Plant shows Mendelian inheritance pattern)

What will be the phenotypic ratio obtained from the selfing of a plant with the genotype $AABb$?

$A$ cross between two homozygous parents that differ in only one gene locus is known as a....

When experimenting with the factor of tallness in $Pisum$ $sativum$,Mendel obtained the results $73.97\%$ tall and $26.03\%$ dwarf from one of the crosses. This shows that the parents are:

$A$ true-breeding plant producing red flowers is crossed with a pure plant producing white flowers. The allele for the red color of the flower is dominant. After selfing the plants of the first filial $(F_1)$ generation,what would be the proportion of plants producing white flowers in the progeny?