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Evaluation · Q47

Q.Do you think parthenocarpy and apomixis are different processes? Justify.

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Step 1. Apomixis is defined as reproduction that substitutes for the normal sexual system by skipping meiosis and syngamy - but it still results in a functional seed containing an embryo (via vegetative reproduction, adventive embryony, diplospory or apospory).

Step 2. Parthenocarpy, by contrast, is the development of a fruit-like structure from the ovary without any act of fertilization taking place - and such fruits invariably lack true seeds altogether, since no embryo or seed tissue forms at all.

Step 3. So the key distinction is what is missing: apomixis skips only the gamete-fusion step of reproduction while still producing a seed and embryo by an alternative route, whereas parthenocarpy skips fertilization entirely and produces no seed or embryo whatsoever - only a seedless fruit. …

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