Ovule has embryo sac that makes egg, and 2 polar nuclei. Details Ovule has diploid cell, which undergoes meiosis to form haploid cells. One haploid cell is megaspore. Mitosis produces the embryo sac, the female gametophyte. One of the cells in the embryo sac has 2 separate polar nuclei.
Pollen sacs have diploid microsporocytes.
Meiosis produces haploid microspores. Microspore mitosis produces male gametophyte, the pollen grain, with a tube cell and generative cell. Generative cell will divide into 2 nonmotile sperm. Pollination is transfer of pollen grains from anther to stigma. Self pollinated if pollination of same flower or another flower on same plant Cross pollinated if pollen goes to flower on another plant.