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Flower Reproduction. Structure Meets Function How do perfect flowers avoid self-pollination?. Students will be able to:. Recognize the processes that allow organisms to reproduce sexually. Identify the role of a flower in plant sexual reproduction. - PowerPoint PPT Presentation
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Structure Meets Function
How do perfect flowers avoid self-pollination?
FLOWER REPRODUCTION
Students will be able to:• Recognize the processes that allow organisms to reproduce sexually.• Identify the role of a flower in plant sexual reproduction.• Explain the mechanisms flowers have to avoid self-pollination.
Sexual Reproduction• The process that allows the union of gametes from two different individuals.
Major cellular processes
•Meiosis: Cell division which produces haploid (1N cells)N=number of chromosomes
• Fertilization: Union of gametes to produce a zygote (2N)
Why sex?• Mutation is the ultimate source of genetic variation.
• Sex shuffles up combinations of mutations!
Flowers aid in sexual reproduction
Fertilization in a flower
Lab Activity• How does a plant avoid self-pollination?
• You will observe the structure of a perfect flower.
• You will analyze how the structure allows for the function of cross-pollination (avoiding self-pollination).
Questions to ponder:
• Does timing prevent self-fertilization?• Do the male and female structures prevent accidental self-
fertilizaiton?