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

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.

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.

All of the plants would have green pods.
All of the plants would have green pods.

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

Answer 1

To solve the problem, we need to understand the genetics involved in pea pod color inheritance.

Let's denote:

• G = dominant allele for green pods
• g = recessive allele for yellow pods

The genotype of each of the two parent plants is Gg (heterozygous). When we perform a Punnett square for a cross between two Gg plants, we get the following combinations:

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

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

• GG (homozygous dominant) = green pods
• Gg (heterozygous) = green pods
• gg (homozygous recessive) = yellow pods

Now let's count the results:

• GG (1) = Green
• Gg (2) = Green
• gg (1) = Yellow

So, the ratio of the offspring will be:

• 3 Green (GG and Gg) : 1 Yellow (gg)

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

Answer 2

Data is collected on the frequency of mountain bird songs at three different elevations. Data is collected from 100 birds at each elevation.

Low altitude: 80 below 1500 Hz
Medium altitude: 50 below 1500 Hz
High altitude: 20 below 1500 Hz

How does altitude relate to song frequency of birds?

(1 point)
Responses

Medium altitude has medium frequency songs.
Medium altitude has medium frequency songs.

Higher altitudes are correlated with higher song frequencies.
Higher altitudes are correlated with higher song frequencies.

Altitude does not affect bird song frequencies.
Altitude does not affect bird song frequencies.

Higher altitudes are correlated with lower song frequencies.

Answer 3

Based on the data provided:

• At low altitude (below 1500 Hz): 80 out of 100 birds
• At medium altitude (below 1500 Hz): 50 out of 100 birds
• At high altitude (below 1500 Hz): 20 out of 100 birds

From this data, we can observe that as the altitude increases, the number of birds singing at a frequency below 1500 Hz decreases significantly. This suggests that birds at higher altitudes tend to sing at higher frequencies, as fewer birds are observed singing at lower frequencies.

Therefore, the correct answer is: Higher altitudes are correlated with lower song frequencies.