Concept:Genotypic ratio means the ratio of the different genotypes present among the offspring of a genetic cross.Explanation:The genetic diagram shows how the gametes from the parents combine to produce offspring.When the gametes are crossed, the offspring show only two different genotypes.Each genotype appears in equal numbers among the offspring.Out of every four offspring, two have one genotype and two have the other genotype.This gives the ratio 2:2, which simplifies to 1:1.Therefore, the genotypic ratio of the offspring is 1:1.Answer:A. 1:1
