in alternation of generations, a diploid sporophyte goes through meiosis to form haploid gametophytes.
in alternation of generations a diploid sporophyte goes through meiosis to form?
haploid gametophytes
alternation of generations is defined as the alternation of multicellular diploid and haploid forms in the organism's life cycle, regardless of whether or not these forms are free-living. in some species, such as the alga "ulva lactuca", the diploid and haploid forms are indeed both free-living independent organisms, essentially identical in appearance and therefore said to be isomorphic. the free-swimming, haploid gametes form a diploid zygote which germinates into a multicellular diploid sporophyte. the sporophyte produces free-swimming haploid spores by meiosis that germinate into haploid gametophytes.
alternation of generations
bullet::::- "dominant sporophyte" (sporophytic).in ferns, both the sporophyte and the gametophyte are capable of living independently, but the dominant form is the diploid sporophyte. the haploid gametophyte is much smaller and simpler in structure. in seed plants, the gametophyte is even more reduced (at the minimum to only three cells), gaining all its nutrition from the sporophyte. the extreme reduction in the size of the gametophyte and its retention within the sporophyte means that when applied to seed plants the term 'alternation of generations' is somewhat misleading: "[s]porophyte and gametophyte effectively function as a single organism". some authors have preferred the term 'alternation of phases'.
alternation of generations