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Published byWilfred Hoover Modified over 9 years ago
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Flower Anatomy, Modes of Pollination, and beginning Meiosis
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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.
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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.
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Male reproductive organ Filament – thin stalk - holds anther Anther – produce pollen, male sex cell
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Cross pollination – Transfer of pollen from anther of plant A to stigma on plant B.
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same Self pollination – pollen transferred from anther to stigma on same flower.
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How Pollen Gets Around
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Insects Brightly colored petals Strong sweet fragrance Nectar producing glands
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Wind Large stigmas outside the flower Little /no fragrance Light, non-sticky pollen Lack showy petals
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Birds Long tube shaped flowers Bright red and yellow flowers No odor
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Mammals Strong fruity odor Flowers opening at night
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Four haploid cells are produced from one diploid cell.
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Produce haploid cells gamete Haploid – gamete or sex cell – 1 set of chromosomes Somatic Diploid – Somatic or body cell – 2 sets of chromosomes
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Meiosis Ensures that offspring have the same number of chromosomes in diploid cells as the parent organisms.
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Overview of Meiosis Process by Bozemanbiology’s Mr. AndersonMr. Anderson Sketch Meiosis 1 and Meiosis 2 (p 108-109) in your notes Read “Problem Solving Activity” on page 109
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