Which statement best describes a polygenic trait?(1 point)

Question

Responses

A polygenic trait is controlled by multiple genes and influenced by the environment.
A polygenic trait is controlled by multiple genes and influenced by the environment.

A polygenic trait is only controlled by one gene and influenced by the environment.
A polygenic trait is only controlled by one gene and influenced by the environment.

A polygenic trait is only controlled by one environmental factor.
A polygenic trait is only controlled by one environmental factor.

A polygenic trait is only controlled by multiple environmental factors.

Which statement best describes trait distribution?(1 point)
Responses

Distribution describes the different traits that are found in a population.
Distribution describes the different traits that are found in a population.

Distribution describes the different traits that are found in a species.
Distribution describes the different traits that are found in a species.

Distribution describes how the variation in traits is spread across a population.
Distribution describes how the variation in traits is spread across a population.

Distribution describes how individuals in a population are spread across their habitat.

Use the table to answer the following question.

Grade 10-12
Height Range 55-59 60-64 65-69 70-74
Frequency 4 9 8 4
A statistician collects the following height data in inches for a school district. The statistician says that it is a normal distribution. How did they draw this conclusion?

(1 point)
Responses

When graphed, the data creates a straight line.
When graphed, the data creates a straight line.

The frequencies for each height range are different.
The frequencies for each height range are different.

When graphed, the data creates a bell curve.
When graphed, the data creates a bell curve.

The frequencies for the first and last height range are the same.

Use the graph to answer the question.

An illustration shows a bell-shaped graph.Height in humans is a polygenic trait with a distribution similar to the graph shown. Which is true concerning the distribution of height in human populations?(1 point)
Responses

Most individuals will be at the extremes of height.
Most individuals will be at the extremes of height.

Most individuals will be below average height.
Most individuals will be below average height.

Most individuals will be above average height.
Most individuals will be above average height.

Most individuals will be of average height.
Most individuals will be of average height.
Skip to navigation

In a particular flower, being tall (T) is the dominant gene while being short (t) is the recessive gene. The height gene is linked to the color gene. Being purple (P) is the dominant gene and being pink (p) is the recessive gene.

A homozygous dominant tall (TT) and homozygous recessive pink (pp) flower is crossed with a homozygous recessive short (tt) and homozygous dominant purple (PP) flower. What are the chances that their offspring will be short and pink?

(1 point)
Responses

0%
0%

12.5%
12.5%

25%
25%

100%

Answer 1

Here are the best responses for each question:

1. Which statement best describes a polygenic trait?

   • A polygenic trait is controlled by multiple genes and influenced by the environment.

2. Which statement best describes trait distribution?

   • Distribution describes how the variation in traits is spread across a population.

3. How did the statistician conclude that the height data is a normal distribution?

   • When graphed, the data creates a bell curve.

4. Which is true concerning the distribution of height in human populations?

   • Most individuals will be of average height.

5. What are the chances that the offspring will be short and pink?

   • 0%

This is because the tall (TT) and short (tt) cross will yield tall offspring exclusively, and all offspring will inherit at least one dominant allele for tallness, resulting in no short individuals. The pink (pp) offspring can only come from a homozygous recessive parent, and since one parent is homozygous dominant for purple color, there can be no pink offspring either.