Question

Red color in flowers shows incomplete dominance over white. A pink flower (Rr) is crossed with a white flower (rr). What percentage of the offspring will be red? A.)25% B.)50% C.)75% D.)0%

Answer 1

Option D

Step-by-step explanation:

In incomplete dominance the characteristics of two different alleles will mix up and produce a new allele.

it is given that genotype of pink flower is Rr and genotype of white flower is rr.

Therefore genotype for red flower would be "RR"

A cross is carried out between Rr and rr.

Following offspring are produced -

Rr *rr

Rr, Rr, rr, rr

Out of four, offspring with genotype Rr are pink in color, whilr genotype rr are white in color.

Thus, none of the offspring is red in color.

Hence, option D is correct

Answer 2

When Rr is crossed with rr, following offsprings are produced,

Rr x rr

Rr (pink)

Rr (pink)

rr (red)

rr (red)

So out of 4 off springs, 2 are rr and thus the probability becomes

2/4 = 50%