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AP BIOLOGY

AP BIOLOGY. Welcome! Why are you here?. Resources: Class blog and New Textbook. biohart.wordpress.com. Labs. 12 required – one essay guaranteed on AP exam Detailed written reports Suggestion – inexpensive separate folder for completed labs. Perseverance:. Ask questions Help one another

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AP BIOLOGY

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  1. AP BIOLOGY Welcome! Why are you here?

  2. Resources: Class blog and New Textbook • biohart.wordpress.com

  3. Labs • 12 required – one essay guaranteed on AP exam • Detailed written reports • Suggestion – inexpensive separate folder for completed labs

  4. Perseverance: • Ask questions • Help one another • Stay on top of it • Deep breathing exercises

  5. Summer assessment • Item analysis done! • Content you guys seem to “remember” • Cells, DNA basics, and Ecology • Content you guys need to brush up on a bit • Mitosis, Meiosis and Mendelian genetics basics, and Evolution • Content that we won’t review now but is coming up: biochemistry and science process skills

  6. So where should we start?

  7. Cellular Division - mitosis * What are some of the major differences in the cell division of prokaryotic cells compared to eukaryotic cells is? * Prokaryoticchromosomes do not separate along a mitotic spindle like eukaryotic cells, others?

  8. Cellular Division – mitosis in eukaryotes A plant cell has 12 chromosomes at the end of mitosis. How many chromosomes did it have at the beginning of the cell cycle? C. 12

  9. Cellular Division – mitosis in eukaryotes How many chromatids would the plant cell with 12 chromosomes have in the G2 phase of its cell cycle? D. 24

  10. Cellular Division - mitosis Humans have a 2n number of 46. How many chromosomes would be found in each of the following? A. Somatic cells = B. Gametes =

  11. Cellular Division - meiosis The restoration of the diploid chromosome number after halving in meiosis is due to * fertilization

  12. Cellular Division - meiosis

  13. Cellular Division - meiosis Homologous pairs?

  14. Cellular Division - meiosis

  15. Cellular Division - meiosis • One homologous pair has ____ number of sister chromatids?

  16. Cellular Division - meiosis • Each sister chromatid has their own kinetochore

  17. Cellular Division - meiosis

  18. 27. The restoration of the diploid chromosome number after halving in meiosis is due to B. fertilization

  19. Is this organism homozygous or heterozygous? How do you know?

  20. Heterozygous dihybrid cross • L= long ears • l = short ears • R = red fur • r = white fur • Long eared, white fur offspring are eaten more readily by predators. Bummer.

  21. Evolution • Long eared, white fur offspring are eaten more often by predators. • Let’s assume that all of the offspring of a population with the above stated phenotype got eaten. • What effect does this have on the population?

  22. Evolution • Nature selects based on phenotype but the impact is at the level of genotype. • Bacteria are more and more resistant to antibiotics. Why? • Directional selection by the way

  23. Evolution

  24. Evolution Darwin proposed that new species evolve from ancestral forms by the gradual accumulation of adaptations to changing environments • Explains our unity and diversity

  25. Evolution Explain natural selection the reproductive success of the members of a population best adapted to the environment

  26. Cell Parts and Function Review TYPICAL ANIMALCELL

  27. Cell Parts and FunctionsReview Continued TYPICAL PLANT CELL

  28. Endomembrane System

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