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Formation of Female Gamete

Formation of Female Gamete

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Formation of Female Gamete

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  1. Formation of Female Gamete Embryo Sac Development

  2. Cells of Carpel Sac are 2n • Cell in Ovule divide by Meiosis and it becomes the embryo sac or Megaspore

  3. Meiosis • 4 Haploid Cells are made • 3 die and 1 survive

  4. Cell Division • Mitosis • Mitosis • Mitosis

  5. 8 Nuclei • The Embryo Sac swells and now contains 8 nuclei • This is also called the Megaspore

  6. Nuclei in Embryo Sac • Polar Nuclei and Egg Cell survive • Other Nuclei die 2 Polar Nuclei Egg Cell

  7. Double Fertilisation • 1 male gamete from the pollen grain fuses with the egg nucleus to form the embryo plant • Polar Nuclei join with the 2nd Cell form pollen grain to form Endosperm Fertilised Ovule = Seed Integument = Testa No water needed Adaptation to life on land