Correct option is B
Explanation:
- Statement A: Directional selection changes the average value of a trait. (True)
- Directional selection favors one extreme phenotype, leading to a shift in the population's average trait value over time.
- Statement B: Stabilizing selection increases variation in a trait. (False)
- Stabilizing selection actually reduces variation by favoring the intermediate phenotype and selecting against extreme variations.
- Statement C: Disruptive selection reduces variation in a trait. (False)
- Disruptive selection increases variation by favoring extreme phenotypes and selecting against intermediate ones.
- Statement D: Balancing selection maintains variation in a trait. (True)
- Balancing selection preserves genetic diversity in a population, preventing alleles from being lost.
