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Mention the reasons for difference in pl...

Mention the reasons for difference in ploidy of zygote and primary endosperm nucleus in an angiosperm.

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A Zygote is formed by the fusion of haploid male gamete with the haploid egg to form a diploid eel, where as, Primary Endosperm Nucleus (PEN) is formed by the fusion of haploid male gamete with two haploid polar nuclei, producing a triploid nucleus.
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