Question

At what stage does the meiosis occur in an organism exhibiting haploidic life cycle and mention the fate of the products thus produced?

Answer 1

Meiosis is a special type of cell division of germ cells in sexually reproducing organisms used to produce gametes, such as sperm or egg cells. It comes from the Greek word meiosis, which means "lessening" because it is a reductional division.

Complete answer:
Meiosis is a two-stage division process that produces four cells with only one copy of each chromosome (haploid). Additionally, genetic material from the paternal and maternal copies of each chromosome is crossed over before division, resulting in new code combinations on each chromosome.
During fertilization, the haploid cells produced by meiosis from a male and female will fuse to form a zygote, which has two copies of each chromosome. Aneuploidy (an abnormal number of chromosomes) is the most common genetic cause of developmental disabilities, and errors in meiosis are the leading known cause of miscarriage.
Meiosis starts with a diploid cell that has two copies of each chromosome, referred to as homologs. The cell first replicates its DNA, resulting in each homolog having two identical sister chromatids. The homologs then pair up and exchange genetic information via homologous recombination, which frequently results in physical connections (crossovers) between them.
Since the zygote is the only diploid cell in the life cycle of such organisms, meiosis can only occur during a diploid stage (post-zygotic stage). The fertilization will cause this meiosis in haploid organisms.

Note:
Mitosis, the type of cell division used by eukaryotes to divide one cell into two identical daughter cells, uses many of the same mechanisms as meiosis. Meiosis produces spores, which are haploid cells that can divide vegetatively without fertilization, in some plants, fungi, and protists. Some eukaryotes, such as bdelloid rotifers, cannot undergo meiosis.