PATHOLOGY

Detailed explanation-1: -In this situation, every offspring produced from this cross with be a heterozygote (Pp), and because purple is dominant to white, all the offspring will be purple. Therefore, the probability of an offspring having white flowers is zero.

Detailed explanation-2: -The F1 plants all have one purple allele (P) and one white allele (p). The genotype is the alleles for each gene in the plant. Here the genotype is Pp.

Detailed explanation-3: -Two pea plants, both heterozygous for flower color, are crossed. The offspring will show the dominant purple coloration in a 3:1 ratio. Or, about 75% of the offspring will be purple.

Detailed explanation-4: -Because all progeny plants will have the genotype Pp, and as the P is a dominant allele, that is purple colour is dominant, all the plants with Pp genotype will have purple coloured flowers.