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(C) The phenomenon of the sudden reappearance of ancestral features in an organism is called $Atavism$.In humans,the appearance of vestigial or ancest

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Atavism

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(C) The phenomenon of the sudden reappearance of ancestral features in an organism is called $Atavism$.In humans,the appearance of vestigial or ancestral traits such as a short temporary tail,thick body hair,or additional nipples in a newborn is a classic example of $Atavism$.This occurs due to the expression of genes that were active in distant ancestors but have been suppressed during the course of evolution.

$A$ baby has been born with a small tail. It is a case of exhibiting:

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