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Meaning of heterosis

het•er•o•sis

Pronunciation: (het"u-rō'sis), [key]
— n. Genetics.
  1. the increase in growth, size, fecundity, function, yield, or other characters in hybrids over those of the parents. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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