atavism

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atavism

 [at´ah-vizm]
apparent inheritance of characters from remote ancestors. adj., adj atavis´tic.

at·a·vism

(at'ă-vizm),
The appearance in an individual of characteristics presumed to have been present in some remote ancestor; reversion to an earlier biologic type, a throwback.
[L. atavus, a remote ancestor]

atavism

(ăt′ə-vĭz′əm)
n.
1. The reappearance of a characteristic in an organism after several generations of absence.
2. An individual or a part that exhibits atavism. Also called throwback.
3. The return of a trait or recurrence of previous behavior after a period of absence.

at′a·vist n.
at′a·vis′tic adj.
at′a·vis′ti·cal·ly adv.
Any of a number of normally dormant traits—e.g., the presence in humans of multiple nipples, appearance of vestigial hind limbs in whales, or possibly hereditary hypertrichosis in humans

atavism

Any of a number of normally dormant traits–eg, the presence in humans of multiple nipples, appearance of vestigial hind limbs in whales, or possibly hereditary hypertrichosis in humans

at·a·vism

(at'ă-vizm)
The appearance in an individual of characteristics presumed to have been present in some remote ancestor; reversion to an earlier biologic type; a throwback.
[L. atavus, a remote ancestor]

atavism

The reappearance of a genetic characteristic after generations of absence. This may be caused by the coincidence of two recessive genes, by recombination, or by mutation. The organism or individual so produced is often called a ‘throwback’.

atavism

the recurrence of a characteristic possessed by an ancestor after an absence for several generations.