Question

A plant can produce either purple flowers or white flowers. What is the probability of purple-flowered offspring if two plants that are heterozygous for purple flowers are crossed? 1:4 2:4 3:4 4:4

Answer 1

Pp*Pp= PP, Pp, Pp, pp so the ans. is 3:4 as P- purple flower p- white flower

Answer 2

Answer:

The correct answer would be 3:4.

The phenotype of the heterozygous plant was purple color flower. Hence, purple flower is a dominant trait and white flower is a recessive trait.

Let us assume P and p be the dominant and recessive allele of a gene responsible for the color of the flowers in a plant respectively.

The genotype of the parent plants would be Pp (heterozygous).

Two types of gametes would be produced: P and p

The cross will result in the production of offspring with 3 types of genotypes in 1 (PP) : 2 (Pp) : 1 (pp).

Thus, three out of four (1 PP + 2 Pp) would have purple color flowers and 1 (pp) out of four would have white flowers.