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Unformatted text preview: -The initial macrosporocyte (mother cell) undergoes meiosis and produces 4 haploid daughter cells. 3 of them degenerate and the surviving one divides mitotically and produces 8 products: 3 antipodals, 2 synergids, and egg cell and 2 polar bodies -When the pollen grain lands on the stigma, it produces a pollen tube which goes down the style and grows through an opening called the micropyle germinates-2 sperm cells as well as a tube nucleus are sent down the pollen tube -The sperm nuclei are involved in fertilization, which occurs in 2 steps-A sperm nucleus + egg cell = zygote (2n)-one sperm nucleus + 2 polar bodies undergo triple fusion = endosperm (3n) provides nutrition to the embryo-this is known as double fertilization...
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- Fall '11
- Sperm, sperm cells, Pollen, egg cell, mature pollen grains