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  4. Zygote of Spirogyra produces four haploid nuclei, in which:

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Q. Zygote of Spirogyra produces four haploid nuclei, in which:

ManipalManipal 2004

Solution:

The united protoplasmic mass of two gametes is called (zygote) zygospore. Prior to germination the diploid zygospore nucleus undergoes meiosis and forms $4$ nuclei, three of these abort and only one is functional. It undergoes transverse division to give, rise single filament.