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

Answer

           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.

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,RrPink Flower.

Result              

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

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.