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Earn 100

All of the following statements are correct regarding genetic drift except
(a)It is called the Sewall–Wright effect.
(b)Its effects are most apparent in a small population.
(c)It refers to the migration of members of the small population into another.
(d)It refers to a change in allele frequency by chance.

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Important Questions on Evolution
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Match the Column I with Column II and find the correct answer
Column - I | Column - II | ||
Aneuploidy | p | Increase in the whole set of chromosomes | |
Monoploidy | q | Loss or gain of a chromosome | |
Polyploidy | r | Two sets of chromosome | |
Diploidy | s | A single set of chromosomes |

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According to the Darwinian theory of natural selection, the rate of appearance of new forms is linked to the life cycle or the life span of an organism. Explain with the help of an example.

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Statement I: The existence of deleterious genes within the populations is called genetic load.
Statement II: The changes in the frequency of a gene that occurs merely by chance in small populations is called genetic drift.
The correct option among the following is

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Reason The change in the frequency of a gene that occurs merely by chance and not by selection, in very large population, is called genetic drift

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