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Q.

Identify the immediate cause of variations.

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a

Recombination.

b

Mutations.

c

Inbreeding.

d

Environmental changes.

answer is C.

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Detailed Solution

Concept: There are three sources of variations:
1. Mutation.
2. Recombination.
3. Gene migration.
Be that as it may, recombination without anyone else doesn't deliver variety except if alleles are segregating.
Recombination is the exchange of DNA segments between homologous chromosomes.

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