Question

The primary effect of selection for a character is:

• A. To increase variation
• B. To increase h2
• C. To change the population mean
• D. None of these

Hint:

Selection: shifts population mean.
Directional selection.
Response to selection = heritability \(\times\) selection differential.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Selection is a process in breeding.
It has specific effects on populations.

Step 2: Key Formula or Approach:
No specific formula.
Need to understand the effects of selection.

Step 3: Detailed Explanation:
The primary effect of selection is to change the population mean.
Selection favours individuals with desirable traits.
This shifts the mean of the population.
Variation may decrease, not increase.
h\(^2\) may change, but that is not the primary effect.
Thus, the primary effect is to change the population mean.

Step 4: Final Answer:
The primary effect of selection is to change the population mean.
Hence, the correct option is (C).