NEET BIOLOGY

Detailed explanation-1: -Sexual life cycles involve an alternation between meiosis and fertilization. Meiosis is where a diploid cell gives rise to haploid cells, and fertilization is where two haploid cells (gametes) fuse to form a diploid zygote.

Detailed explanation-2: -Alternation of generations means that plants alternate between two different life stages, or generations, in their life cycle; a haploid stage called gametophyte and a diploid stage called sporophyte.

Detailed explanation-3: -The ‘alternation of generations’ in the life cycle is thus between a diploid (2n) generation of sporophytes and a haploid (n) generation of gametophytes.

Detailed explanation-4: -alternation of generations, also called metagenesis or heterogenesis, in biology, the alternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct.

Detailed explanation-5: -Gametophytes Are the Haploid Stage The gametophyte stage, or generation in the alternation of generations life cycle, is the haploid (n) stage. The gametophyte stage can also be thought of as the sexual stage because it will produce the gametes, or sex cells. This stage only has one set of chromosomes.