How many mitotic division take place …
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Meghna Thapar 5 years, 4 months ago
During development of the corn embryo sac, which displays the so-called polygonum type of development, three mitotic divisions give rise to two groups of four nuclei, one at the end closest to the embryo (the micropylar end) and one in the opposite (chalazal) end of the embryo sac. Based on the number of megaspores, embryo sacs can be divided into three types: monosporic, bisporic, and tetrasporic. In the monosporic, or Polygonum-type embryo sac, meiosis of the diploid megaspore mother cell in the nucellus produces four haploid megaspores.
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