what is haplo-diplontic life cycle?

Haplodiplontic life cycle is an intermediate condition between haplontic and diplontic life cycle.

Both gametophyte and sporophyte are free-living and multicellular, but have different dominant phases.

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Haplodiplontic Life Cycle

Intermediate condition

Bothgametophyte and sporophyte are free-living and multicellular, but have different dominant phases.

In Bryophytes, haploid gametophyte is dominant, independent, and photosynthetic. It alternates with short-lived multicellular sporophyte totally or partially and is dependent on gametophyte for nutrition and anchorage.In Pteridophytes, diploid sporophyte is dominant, independent, and photosynthetic. It alternates with short-lived haploid gametophyte, which is independent of sporophyte.