Plant KingdomHard
Question
In Ulothrix / Spirogyra, reduction division (meiosis) occues at the time of
Options
A.gamete formation
B.zoospore formation
C.zygospore germination
D.vegetative repoduction
Solution
In Ulothrix / Spirogyra, gametes produced from (+) and ( - ) plants/ filamens results in the formation of diploid zygote (2x). Zygote is tetraflagellated, it secretes a thick wall and becomes non-motile to form diploid zygospore. Under favourable conditions, zygospore undergoes zygotic meiosis to form motile tetraflagellated zoomeiospore or non-motile aplanomeiospores, Each meiospore (haploid) germinates to form a new filament of (+) (-) strain.
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