The production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram is called:
Bullet square
Punch square
Punnett square
Net square
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach in 1905. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.