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lum, result in a continuous growth of plants, their life., 10.4 MEIOSIS, > accrurs in en cell, Meiosis, FRechuction divusion, Eu danghtir ell, The production of offspring by sexual reproduction includes the fusion, af two gametes, each with a complete haploid set of chromosomes. Gametes, are formed from specialised diploid cells. This specialised kind of cell, division that reduces the chromosome number by half results in the, production of haploid daughter cells. This kind of division is called, meiosis. Meiosis ensures the production of haploid phase in the life cycle, of sexually reproducing organisms whereas fertilisation restores the diploid Gametic, phase. We come across meiosis during gametogenesis in plants and emimal, animals. This leads to the formation of haploid gametes. The key features, of meiosis are as follows:, amalitative, yantitati ve, dessimitar, Germinal diwision, † germ cell, sepro duction, - droing, dieyleocc at particidar, event, Zygote, -Intal, - Algas 1 Frunge', - Haplanti c., Sparic, Anumal, Diplontic, cre plication = 1, Meiosis involves two sequential cycles of nuclear and cell division called, meiosis I and meiosis II but only a single cycle of DNA replication., Meiosts I is initiated after the parental chromosomes have replicated, to produce identical sister chromatids at the S phase., di'v, = 2., WI, Meiosis involves pairing of homologous chromosomes and, recombination between them., nttr phose, Four haploid cells are formed at the end of meiosis II., Meiotic events can be grouped under the following phases: pinbromee Ex, >hechuetional div Sauational dliv., Meies isI, Meiosis I, Meiosis II, Prophase I, Prophase II, Metaphase I, Metaphase II, 4, Anaphase I, Anaphase II, Telophase I, Telophase II, Intorphos, (R epli c-))

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The meiotic cell division first time described by Van, Beneden in 1883, • Meiotic cell division occurs in germ cells of all living, organism., During meiosis, the genetic material of a diploid germ, cell undergoes two nuclear divisions and resulting in, to four haploid daughter cells., Each daughter cells has one half of the number of, chromosomes as the parent cell., There are two successive nuclear divisions in meiosis, as compared to the one division found in mitosis., • The two stages of meiosis are, 1. Meiosis I, 2. Meiosis II, • Meiosis I also called as Reductional Division, • Meiosis II also called as Equational Division, • Before a dividing cell enters meiosis, it undergoes a, period of growth called Interphase.