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Evaluation · Q45

Q.Define the term Diplospory.

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Step 1. Diplospory is classified under agamospermy, itself a form of recurrent apomixis - reproduction that substitutes for the normal sexual (amphimictic) process.

Step 2. In diplospory, the megaspore mother cell - which would normally undergo meiosis to give four haploid megaspores - instead forms the embryo sac directly, without undergoing regular meiotic division.

Step 3. Because meiosis (the reduction division) is skipped, the resulting embryo sac retains the diploid (2n) chromosome number of the megaspore mother cell, rather than being haploid as in normal sexual reproduction. …

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