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Sexual Reproduction in Flowering Plants

Sexual Reproduction in Flowering Plants. Flower Anatomy, Modes of Pollination, and beginning Meiosis . Flower Anatomy. Pistil. Pistil- the central part of the flower, pollen must land before seeds can form. Stigma- sticky top of pistil, catches pollen.

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Sexual Reproduction in Flowering Plants

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  1. Sexual Reproduction in Flowering Plants Flower Anatomy, Modes of Pollination, and beginning Meiosis

  2. Flower Anatomy

  3. Pistil Pistil- the central part of the flower, pollen must land before seeds can form. Stigma- sticky top of pistil, catches pollen. Style- "stem" of pistil, tube pollen follows to ovary.

  4. Pistil • Ovary- • base of pistil; where ovule located. • Ovule- • female portion of the plant's reproductive system. • part within plant's flower pistil - becomes seed or site of fertilized egg development.

  5. Stamen Male reproductive organ Filament – thin stalk - holds anther Anther – produce pollen, male sex cell

  6. Cross pollination – Transfer of pollen from anther of plant A to stigma on plant B.

  7. Self pollination – pollen transferred from anther to stigma on sameflower.

  8. Modes of Pollination How Pollen Gets Around

  9. Modes of Pollination Insects • Brightly colored petals • Strong sweet fragrance • Nectar producing glands

  10. Modes of Pollination Wind • Large stigmas outside the flower • Little /no fragrance • Light, non-sticky pollen • Lack showy petals

  11. Modes of Pollination Birds • Long tube shaped flowers • Bright red and yellow flowers • No odor

  12. Modes of Pollination Mammals • Strong fruity odor • Flowers opening at night

  13. Meiosis Four haploid cells are produced from one diploid cell.

  14. Meiosis • Produce haploid cells • Haploid – gameteor sex cell – 1 set of chromosomes • Diploid – Somatic or body cell – 2 sets of chromosomes

  15. Meiosis Ensures that offspring have the same number of chromosomes in diploid cells as the parent organisms.

  16. Meiosis Overview of Meiosis Process by Bozemanbiology’sMr. Anderson Sketch Meiosis 1 and Meiosis 2 (p 108-109) in your notes Read “Problem Solving Activity” on page 109

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