Question

What is haplontic and diplontic and haplo-diplontic condition in plants?

Answer 1

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haplontic life cycle — the haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic". ... haplodiplontic life cycle (also referred to as diplohaplontic, diplobiontic, or dibiontic life cycle) — multicellular diploid and haploid stages occur, meiosis is "sporic".

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Answer 2

Answer:

Haplontic - when sporophytic generation is represented by only one celled zygote and gametophyte is dominant.

Example : volvox,spirogyra,chlamydomonas

Diplontic - When the gametophytic phase is represented by single to few celled haploid gametophyte and sporophyte is dominant.

Example : gymnosperms, angiosperms,fucus

Haplo-diplontic - An intermediate condition between haplontic and diplontic lifecycle where both sporophyte and gametophyte are free living and multicellular but have different dominant phases.

Example : Ectocarpus , polysiphonia , kelps