How many pollen mother cells will form 1000 pollen grains

Solution (By Examveda Team)

250 pollen mother cells will form 1000 pollen grains.
One diploid microspore mother cells by meiosis form 4 tetrads of haploid microspores which become 4 pollen grains.
Thus, 250 pollen mother cells will produce 1000 pollen grains, by undergoing 50 rounds of meiosis.