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%

Question

Biology

Serena Goodman

26 August, 00:49

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%

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Answers (2)

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Kaya Dean · Answer 1

Option D

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

Davies · 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%