pls explain hapontic diplontic and haplodiplontic life cycle patterns

Dear Student,

There is alternation of generations between haploid gametophyte and diploid sporophyte in the life cycle of a plant. In plants, both haploid and diploid cells can divide by mitosis. Hence, there are two different plant bodies – haploid and diploid. The haploid plant body produces gametes by mitosis and represents a gametophyte. Mitotic division is encountered in diploid cells when zygote divides by mitosis to produce sporophytic plant body after fertilization. This sporophyte produces haploid spores by meiosis. Spores in turn undergo mitosis to form haploid plant body. For further information on this concept, kindly refer to lesson 6; chapter 3.

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