Lecture+14+Notes

Lecture+14+Notes - number Red = maternal Blue = paternal...

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Midterm: Wednesday, October 28th 75 points, covers lectures 1-13 Randomized seating chart will be posted at doors Bring a pencil (or two) and your student ID Write your name and ID on each page of exam Try not to bring your backpack, but if you must, place it under your seat Keep exam face down until all students have their exams and we give you the signal to begin Cell phones must be off All quizzes are still available to take
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Lecture 14: Meiosis Monday 10/26/09 Reading Chapter 13 Pgs 248-260 Pre-Lecture Quiz
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The Cell Cycle Prophase, metaphase, anaphase, telophase, and cell division or cytokinesis G o
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MEIOSIS: a special type of cell division used in sexual reproduction for the formation of gametes Human Life Cycle
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Preparation of a human karyotype
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Karyotype Somatic cells of each species contain a specific number of chromosomes Human cells have 46, making up 23 pairs of homologous chromosomes
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Overview of meiosis: how meiosis reduces chromosome
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Unformatted text preview: number Red = maternal Blue = paternal Meiosis I: separates homologous chromosomes Meiosis II: separates sister chromatids QuickTimeª and a H.264 decompressor are needed to see this picture. Property Mitosis Meiosis A comparison of mitosis and meiosis What happens when a pair of sister chromatids do NOT separate (non-disjunction)? Fig.15.13 Pg.297 QuickTimeª and a YUV420 codec decompressor are needed to see this picture. What happens when a pair of sister chromatids do NOT separate (non-disjunction) and it happens to chromosome 21? Meiosis - How is variability generated? 1) Independent assortment of chromosomes 2) Crossing over 3) Random fertilization 1) Independent assortment of homologous chromosomes 2) Crossing over during meiosis 3) Random Fertilization…. Note for midterm: Note for Friday’s lecture: Reading and study guide for Lecture 15 Required reading Chapter 14, pages 262-271 Pre-Lecture Quiz...
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Lecture+14+Notes - number Red = maternal Blue = paternal...

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