Figure 21.3 in a Very Large Population, a Quantitative Trait Has the Has

question 54

Multiple Choice

Figure 21.3
In a very large population, a quantitative trait has the distribution pattern shown in Figure 21.3. If the curve in Figure 21.3 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

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Definitions:

Variance

A numerical indicator that shows the distribution or variability of a dataset around its average value.

SPSS Output

The results and data analyses generated by the Statistical Package for the Social Sciences software after processing information.

Correlation Coefficient

A numerical measure of some type of correlation, meaning a statistical relationship between two variables, ranging from -1 to 1.

Mean

A type of average calculated by summing values and dividing that sum by the number of values.