1. Which statement best describes a polygenic trait?
A. A polygenic trait is only controlled by one environmental factor.
B. A polygenic trait is only controlled by multiple environmental factors.
C. A polygenic trait is only controlled by one gene and influenced by the environment.
D. A polygenic trait is controlled by multiple genes and influenced by the environment.
2. An animals weight is determined by:
A. a single gene only
B. multiple genes only
C. both a single gene and environmental factors
D. multiple genes and environmental factors
3. Which statement best describes trait distribution
A. Distribution describes how individuals in a population are spread across their habitat.
B. Distribution describes how the variation in traits is spread across a population.
C. Distribution describes the different traits that are found in a population. Distribution describes the different traits that are found in a population.
D. Distribution describes the different traits that are found in a species.
4. use the table to answer the following question.
distribution. How did they draw this conclusion?
A. When graphed, the data creates a straight line.
B. When graphed, the data creates a bell curve.
C. The frequencies for each height range are different.
D. The frequencies for the first and last height range are the same.
5. 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?
A. Most individuals will be of average height.
B. Most individuals will be above average height.
C. Most individuals will be at the extremes of height.
D. Most individuals will be below average height.
1. D. A polygenic trait is controlled by multiple genes and influenced by the environment.
2. D. Multiple genes and environmental factors.
3. B. Distribution describes how the variation in traits is spread across a population.
4. B. When graphed, the data creates a bell curve.
5. A. Most individuals will be of average height.