Meiosis is a type of a cell division where the diploid number of chromosomes is reduced to haploid number this reduction division is responsible for the maintenance of the constancy of chromosomal number in the sexually reproducing organisms it is characterized by a single duplication of chromosomes in the parent cell forwarded to TWO nuclear divisions karyokinesis and two cell division cytokinesis
meiosis 1 is also known as reduction division or heterotopic division during this division the chromosome number is reduced to half prior to meiosis 1 there is interphase where the duplicated chromosomes occur as chromatic after INTERFACE the chromosome number is 2n in a diploid cell but chromatic number is double and DNA CONTENT is 4C each chromosome exist as a pair of chromatids held Together by the centromere
occurrence: meiosis occurs in specific diploid cells at a particular time they occur in gonads of animal microspore and megaspore mother cells of plants the cells undergo meiosis are called myocytes
examples : spermatocytes produces sperms and oocytes produce ova in animals and in the sporangia of plants the meiocyte are microspore mother cell forming MICROSPORES and megaspore mother cells forming Mega Spors