According to the Neo-Darwinian theory, which of the following is responsible for the origin of new species

  • A

    Mutations

  • B

    Useful variations

  • C

    Mutations together with natural selection

  • D

    Hybridization

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In Hardy­Weinberg equation, the frequency of heterozygous individual is represented by

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$[Image]$

Type $I$ Type $II$ Type $III$

Give scientific reasons : Genetic drift is much more likely to change allele frequencies in a small population rather than large population.
 

Gene pool is referred to

  • [AIIMS 2009]