Reproduction
(plants)

Diploid and Haploid cells

Gametes in flowering plants

Insect pollination

Wind pollination

  • The exception are sex cells or Gametes which only have one set of chromosomes
  • Most cells in organisms are diploid cells which means they have 2 matching sets of chromosomes
  • Ovules contain the plant's female gametes, this is produced in the Ovary
  • Wind pollinated flowers are neither colourful or scented as they dont need to attract any insects
  • They have feather stigmas that hang out of the flower
  • Pollen grains are spiky to stick onto pollinators
  • Both the anthers and ovary are present in the flower
  • Pollen grains contain the plant's male gametes, these pollen grains are produced in the Anthers
  • pollination is the transfer of pollen from the anther to the stigma
  • Insect pollinated flowers are colourful, scented and have very sticky Stigmas within the flower
  • Pollen grains are light and streamline to blow in the wind

Fertlisation

  • The zygote develops into an embryo
  • In plant the zygote develops into seeds
  • A zygote is prouced
  • The ovary wall becomes the fruit

Process

  • From the stigma the pollen grains grows a pollen tube
  • which grows towards the ovary
  • on reaching the ovary the tube bursts
  • releases the male gamete
  • once inside the gamete nuclei fuse together
  • This is Fertlisation