Pea pods exist in the same colors as pea seeds, yellow and green. However, unlike pea seeds, green is dominant and yellow is recessive. Two pea plants both have one dominant and one recessive allele for pod color. Which choice correctly states what ratio of the offspring would be from a mating of the two plants?(1 point)

Question

Pea pods exist in the same colors as pea seeds, yellow and green. However, unlike pea seeds, green is dominant and yellow is recessive. Two pea plants both have one dominant and one recessive allele for pod color. Which choice correctly states what ratio of the offspring would be from a mating of the two plants?(1 point)
Responses

One quarter of the plants would have yellow pods, and three quarters would have green pods.
    One quarter of the plants would have yellow pods, and three quarters would have green pods.
    All of the plants would have green pods.
    All of the plants would have green pods.
    Half of the plants would have yellow pods, and half would have green pods.
    Half of the plants would have yellow pods, and half would have green pods.
    Three quarters of the plants would have yellow pods, and one quarter would have green pods.

GPT-4o mini · Answer

To solve this problem, we can use a Punnett square to determine the offspring's pod colors from a cross between two pea plants that both have one dominant allele for green pods (G) and one recessive allele for yellow pods (g).

The genotypes of the parent plants can be represented as:

Parent 1: Gg
Parent 2: Gg

When we set up a Punnett square, we have:

| | G | g | |-----|-----|-----| | G | GG | Gg | | g | Gg | gg |

From this Punnett square, we can see the following outcomes:

GG (1/4) - Green pods
Gg (2/4 or 1/2) - Green pods
gg (1/4) - Yellow pods

This leads to the following ratio of pod colors among the offspring:

Green pods: 3 out of 4 (GG and Gg)
Yellow pods: 1 out of 4 (gg)

Therefore, the correct answer is: One quarter of the plants would have yellow pods, and three quarters would have green pods.