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

0%
0%

50%
50%

100%
100%

25%

Answer 1

To determine the probability of offspring having white flowers from a red snapdragon crossed with a pink snapdragon, we can set up the genotypes:

• The red snapdragon, which has the genotype RR (homozygous red).
• The pink snapdragon, which has the genotype RW (heterozygous).

Now, we can perform a Punnett square to find the possible genotypes of the offspring:

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

From this Punnett square, we can see the possible genotypes of the offspring:

• RR (red flowers) - 2 squares
• RW (pink flowers) - 2 squares

The offspring will have:

• 2 RR (red) and 2 RW (pink), so there are no genotypes that lead to white flowers (WW).

Therefore, the probability that the offspring will have white flowers is 0%.