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 Three quarters of the plants would have yellow pods, and one quarter would have green pods. Three quarters of the plants would have yellow pods, and one quarter 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. 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.

Answer 1

To determine the offspring ratio from a mating of two pea plants that each have one dominant allele for green pods (G) and one recessive allele for yellow pods (g), we can use a Punnett square.

Each parent can contribute either a G (green) or a g (yellow). The possible combinations for the offspring are as follows:

1. GG (homozygous dominant) - green pods
2. Gg (heterozygous) - green pods
3. gG (heterozygous) - green pods
4. gg (homozygous recessive) - yellow pods

Setting up the Punnett square:

          G      g
        ___________
    G |   GG   |  Gg  |
        |_______|______|
    g |   Gg   |  gg  |
        |_______|______|

From the Punnett square:

• 1 GG (green)
• 2 Gg (green)
• 1 gg (yellow)

This gives us a total ratio of 3 green pods (GG and Gg) to 1 yellow pod (gg), which can be expressed as:

• 3 green : 1 yellow

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