Types Of Natural Selection
1. Label the three types of polygenic trait selection illustrated below
2. What type of individuals in the population are represented by the 2 ends of the bell curve?
3. Starlings produce an average of five eggs in each clutch. If there are more than five, the parents cannot adequately feed the young. If there are fewer than five, predators may destroy the entire clutch. This is an example of a. disruptive selection. b. stabilizing selection. c. directional selection. d. none of the above.
4. The occurrence of large or small beak sizes among seed crackers in the absence of medium sized beaks is an example of a. directional selection. b. stabilizing selection. c. disruptive selection. d. none of the above.
5. A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection? a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
6. Refer to question 13, but this time answer what you would expect after 10 generations of disruptive selection. a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
7. Refer to question 13, but this time answer what you would expect after 10 generations of directional selection. a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
Each of the following is an example of stabilizing, disruptive, or directional selection. Choose the correct term for each example, explain why it fits that category and sketch the appropriate graph.
8. Larger squirrels can carry larger acorns to their burrows, and they outcompete smaller squirrels when acorn supplies are limited. ________________
2. What type of individuals in the population are represented by the 2 ends of the bell curve?
3. Starlings produce an average of five eggs in each clutch. If there are more than five, the parents cannot adequately feed the young. If there are fewer than five, predators may destroy the entire clutch. This is an example of a. disruptive selection. b. stabilizing selection. c. directional selection. d. none of the above.
4. The occurrence of large or small beak sizes among seed crackers in the absence of medium sized beaks is an example of a. directional selection. b. stabilizing selection. c. disruptive selection. d. none of the above.
5. A scientist measures the circumference of acorns in a population of oak trees and discovers that the most common circumference is 2 cm. What would you expect the most common circumference(s) to be after 10 generations of stabilizing selection? a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
6. Refer to question 13, but this time answer what you would expect after 10 generations of disruptive selection. a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
7. Refer to question 13, but this time answer what you would expect after 10 generations of directional selection. a. 2 cm b. greater than 2 cm or less than 2 cm c. greater than 2 cm and less than 2 cm d. can't tell from the information given
Each of the following is an example of stabilizing, disruptive, or directional selection. Choose the correct term for each example, explain why it fits that category and sketch the appropriate graph.
8. Larger squirrels can carry larger acorns to their burrows, and they outcompete smaller squirrels when acorn supplies are limited. ________________