Question

Two pink-flowering plants are crossed. The offspring percentages are 25% red, 25% white and 50% pink. If a red-flowering plant was crossed with a white-flowering plant what would the phenotypes of the offspring be?

Answer 1

Let R represent dominant red allele and r represent white. Flowers with Rr are pink in colour.

Rr × Rr ---> RR (RED), Rr (pink), Rr (pink), rr (white)

if RR × rr ---> Rr, Rr, Rr, Rr (all offspring will be pink)

this is because red is dominant and white is recessive. since all offsprings will be heterozygous and recessive traits are only expressed in homozygous condition, the phenotype for the offspring will be pink.

Answer 2

All the offspring would be of pink color

Step-by-step explanation:

Let R represents the allele for red color of flower

r represents the allele for white color of flower

Here R and r can occur co dominantly thereby producing pink color flower with genotype "Rr"

Now , it is given a cross is carried out between a red flowering plant "RR" and a white flowering plant "rr".

The cross between the two parents is represented as below-

R R

r Rr Rr

r Rr Rr

Thus, all the offspring would be of pink color