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NEET UG BIOLOGY MCQ: EVOLUTION
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Read the following statements.
I) Directional selection occurs when natural selection favours one extreme of continuous variation.
II) Disruptive selection occurs when natural selection favours both extremes of continuous variation.
III) In directional selection, a population's genetic variance shifts toward a new phenotype when exposed to environmental changes.
IV) Random changes in gene frequencies due to chance in large population is called genetic drift.
True statements are
I) Directional selection occurs when natural selection favours one extreme of continuous variation.
II) Disruptive selection occurs when natural selection favours both extremes of continuous variation.
III) In directional selection, a population's genetic variance shifts toward a new phenotype when exposed to environmental changes.
IV) Random changes in gene frequencies due to chance in large population is called genetic drift.
True statements are
View answer and explanation
Correct option: C
All except IV
Option C (All except IV) is correct because statements I, II, and III accurately describe directional and disruptive selection, while statement IV describes genetic drift in small populations, not large ones.
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