In snapdragons, flower color is determined by a gene that follows an incomplete dominance pattern. In this species, the red allele (R) produces red flowers, and the white (W) allele produces white flowers. The heterozygous individual produces a blended phenotype of pink flowers.

Question

If a red snapdragon is cross pollinated with a pink snapdragon, calculate the probability that the offspring will have white flowers.

(1 point)
Responses

50%
50%

0%
0%

100%
100%

25%

Answer 1

To determine the probability of obtaining offspring with white flowers from a cross between a red snapdragon (RR) and a pink snapdragon (RW), we can set up a simple Punnett square.

1. The genotypes are:

   • Red snapdragon (RR)
   • Pink snapdragon (RW)

2. When we cross these two, we can set up the Punnett square:

       R       R
     ----------------
   R |   RR   |   RR   |
     ----------------
   W |   RW   |   RW   |
     ----------------

3. From the Punnett square, the possible genotypes of the offspring are:
   • 50% RR (red flowers)
   • 50% RW (pink flowers)

Therefore, there is a 0% probability of obtaining offspring with white flowers (WW).

The correct answer is:

0%