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%

25%
25%

100%

Answer 1

To determine the probability of offspring having white flowers when a red snapdragon (RR) is crossed with a pink snapdragon (RW), we can set up a Punnett square.

Here are the alleles of the parents:

• Red snapdragon: RR
• Pink snapdragon: RW

We'll set up the Punnett square:

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

From the Punnett square:

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

Now, we analyze the results:

• Total offspring: 4
• Red flowers (RR): 2/4 = 50%
• Pink flowers (RW): 2/4 = 50%
• White flowers (WW): 0/4 = 0%

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