Question

what kind of development takes place in zygote in organisms with diplontic and haplodiplontic life cycle?

Answer 1

In Diplontic Life Cycle, the zygote in gametic meiosis instead of dividing meiotically, divides mitotically to produce individual or unicellular organism with diploid cells. Diplontic life cycle is mostly observed in animals.

In most of the plants, the zygote undergoes mitotic cell division and produces diploid sporophytes. The sporophyte divides meiotically to produce haploid spores. These spores again undergo mitotic cell division and produce haploid gametophytes. This gametophyte produces gametes by mitosis. This type of life cycle is known as Haplodiplontic Life Cycle.