Assume that in sunflowers red flower color is dominant to yellow. A true-breeding group of red flowered-plants

Question

are crossed with a group of true-breeding yellow plants. what proportion of the offspring would you expect to have yellow flowers? A. 0 B. 1/4 C. 3/4 D. 9/16 E. 1/2

Answer 1

The answer is A. zero

The cross would actually look like this:

Let:

R=red

r=yellow

RR x rr=all Rr

In heterozygous condition the recessive allele is masked hence the dominant allele is the one manifested.

All offspring would be red-flowered hence there would be no yellow-flowered offspring.

Answer 2

1)  A == 0 Zero is the correct answer . All will be Red flowered In F1 generation !!!

From = Botanist