Use the following figure to answer the questions below.
In a very large population, a quantitative trait has the following distribution pattern:

-If the curve in the above figure shifts to the left or to the right, there is no gene flow, and the population size consequently increases over successive generations. Which of the following is (are)probably occurring? 1. immigration or emigration
2. directional selection
3. adaptation
4. genetic drift
5. disruptive selection
A)1 only
B)4 only
C)2 and 3
D)4 and 5
E)1, 2, and 3

Question

Use the following figure to answer the questions below.
In a very large population, a quantitative trait has the following distribution pattern:
 
-If the curve in the above figure shifts to the left or to the right, there is no gene flow, and the population size consequently increases over successive generations. Which of the following is (are)probably occurring? 1. immigration or emigration
2. directional selection
3. adaptation
4. genetic drift
5. disruptive selection
A)1 only 
B)4 only 
C)2 and 3 
D)4 and 5 
E)1, 2, and 3

Quizplus · Accepted Answer

Directional selection and adaptation can cause a shift in the curve, leading to changes in population size over generations.

Use the Following Figure to Answer the Questions Below