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Sporophyte  [ Botany ]

Dictionary of botanic terminology - index of names

  The sporophyte is the diploid plant form in with each cell containing two complete sets of chromosomes.  
The sporophyte develops from the union of two gametes, such as an egg fertilized by a sperm;  in turn, the sporophyte forms spores that develop into gametophytes. The alternation between haploid (gametophyte) and diploid (sporophyte) phases, known as alternation of generations, occurs in all multicellular plants. As plants advanced in evolutionary development, the sporophyte became the increasingly dominant plant form and the gametophyte form has been correspondingly reduced.
In contrast to mosses, for example, in the advanced angiosperms the male and female gametophytes are reduced to three-celled and seven-celled structures, respectively, found within the reproductive organs of the familiar flowering plant (the sporophyte).







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