Sudden appearance of an ancestral character is

Mutation

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Atavism

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Heredity

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None of these

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Solution

The correct option is D Atavism
Mutation is the sudden heritable change in the genome of the organism.
Hereditary is the phenomena of inheritance of characters from one generation to the other.
A sudden appearance of an ancestral character is known as an atavism. The traits which were lost in the course of evolution reappears.
So, the correct answer is option B.

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