NEET Exam Model Paper 7

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Question : 143 of 180
 
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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
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