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Allogamy is a term used in the field of biological reproduction describing the fertilization of an ovum from one individual with the spermatozoa of another. By contrast, autogamy is the term used for self-fertilization. In humans, the fertilization event is an instance of allogamy...
, where an ovum from one individual is fertilized with the spermatozoa of another
Heterosis, or hybrid vigor, or outbreeding enhancement, is the improved or increased function of any biological quality in a hybrid offspring. The adjective derived from heterosis is heterotic....
, where different strains are cross-bred to form a hybrid
the union of pollen from the anther of the stamen, with the female gametes of the pistil