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Meiosis and Sexual Reproduction

Meiosis and Sexual Reproduction. AP BIOLOGY BIG IDEA #3 GENETICS AND INFORMATION TRANSFER BIG IDEA #2 CELLULAR PROCESSES CHAPTER 13, 31 (FUNGI), 38 (PLANTS), 46 (ANIMALS). Basic Sexual Life Cycle. Process of Meiosis. Questions about meiosis:.

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Meiosis and Sexual Reproduction

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  1. Meiosis and Sexual Reproduction AP BIOLOGY BIG IDEA #3 GENETICS AND INFORMATION TRANSFER BIG IDEA #2 CELLULAR PROCESSES CHAPTER 13, 31 (FUNGI), 38 (PLANTS), 46 (ANIMALS)

  2. Basic Sexual Life Cycle

  3. Process of Meiosis

  4. Questions about meiosis: • Which is more like mitosis, meiosis I or II? Explain? • When do sister chromatids separate? • When do homologous chromosomes line up? • How many times does S phase (interphase) occur? • How do the cells produced by meiosis compare to the original cells?

  5. MEIOSIS AND SEXUAL REPRODUCTION • ALLOW FOR INCREASED VARIATION IN OFFSPRING: • INDEPENDENT ASSORTMENT OF CHROMOSOMES • CROSSING OVER • RANDOM FERTILIZATION

  6. INDEPENDENT ASSORTMENT OF CHROMOSOMES

  7. CROSSING OVER

  8. RANDOM FERTILIZATION

  9. Animals and plants have evolved structures to aid in sexual reproduction: • Animals: Reproductive systems & associated hormonal control. • Plants: Flowers • Investigation Question #1: • How do plants avoid self-reproduction?

  10. Mechanisms for avoiding self-reproduction: • Plants can be separate sexes (monecious). • Plants can have flowers that are separate sexes. • Plants can have flowers that have both male and female parts but avoid “selfing” by: • Structural incompatibility • Temporal incompatibility • Genetic incompatibility • Your job in lab will be to collect evidence to determine how Allostromeria species avoids self-reproduction!

  11. What is the role of the fruit in plant reproduction?

  12. Germination of Seeds Investigation #2 • Experimental Question: Does temperature have an effect on germination? • Design an experiment to determine if warm or cool temperatures will impact the germination of seeds.

  13. Investigation #3: Observing the process of meiosis in fungal spores

  14. Patterns show crossing over:

  15. Use the Lab Bench as a guide to help you understand what data you are collecting about your sample fungi: • Experimental Question: What is the crossing over frequency of your Sordaria fungus? http://www.phschool.com/science/biology_place/labbench/lab3/design2.html

  16. You will maintain a lab notebook for the genetics unit: • This lab notebook will be assigned a 100 point grade: • Flower reproduction lab • Seed to Fruit diagrams/table • Seed germination lab • Arizona Karyotype Lab • Crossing over fungi lab • Embryo observations • Chi square and corn lab • Genetics Boot Camp

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