Find out the number of chromosomes present in meiocytes of dogs, rats, rice and potato respectively.

Chromosome number in meiocyte of $‘\mathrm{A}’$ plant, chromosome number in gamete of $‘\mathrm{B}’$ plant are found in $1:1$ ratio, find out the $\mathrm{A}$ and $\mathrm{B}$ plants.

Identify ploidy of following parts of a flowering plant respectively.

Ovary, anther, egg, pollen, the male gamete, zygote.