Question

A seed dealer wants to sell four-o'clock seeds that will produce only red, white, or pink flowers. explain how this should be done.

Answer 1

Four-O'clock plant (Mirabilis jalapa) follow the phenomenon of co-dominance.

Co-dominance

Co dominance is a relationship among allele where both allele contribute to the phenotype of heterozygote.

Step-by-step explanation

Japanese 4 o clock plats have two types of flower in their parental generation that is red and white. When these parents are crossed a new plant with pink colour is also observed in their F1 generation as shown in cross below.

Parental generation

Phenotype Red Flower x White Flower

Genotype RR rr

Gametes R, R r, r

F1 generation Rr, Rr,Rr,Rr.............Pink Flower.

Result

The allele contributes in the phenotype of flower and pink flowers are produced.