The pattern of reproduction occuring in life cycles of many lower plants and some invertebrates, involving a regular alternation between two distinct forms.The generations are alternately sexual and asexual (as in some ferns) or dioecious or parthenogenetic (as in some jellyfishes).
The alternation of two generations (phases) in life cycle of plants namely, gametophyte (haploid) and sporophyte (diploid) phases.
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