Question

Explain haplontic and diplontic life cycle briefly​

Answer 1

Answer:

Haplontic life cycle — the haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic".

Diplontic life cycle — the diploid stage is multicellular and haploid gametes are formed, meiosis is "gametic".

Answer 2

Answer:

haplontic life cycle

The plant body is gametophyte (haploid) and sporophyte (diploid) stage is represented only by zygote. The gametophytic plant develops hap­loid gametes in the gametangium. The fusion between gametes results the formation of zygote, the only diploid stage i.e., sporophytic phase of the life cycle.

The zygote undergoes meiotic division and forms four meiospores. These meiospores develop into haploid plants. The alternation of generations can be interpreted by chromosome number

diplontic life cycle

In this type the haploid and diploid phases are equally prominent and are represented by two distinct vegetative individuals. They differ only in chromosome number and function. The haploid gametophytic plant reproduces by sexu­al method, while diploid sporophytic plant by asexual process. In this life cycle alternation of two vegetative individuals occurs by sporogenic meiosis and fusion of gametes.

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