BIOL 225 Chapter 11 part 1_Au

BIOL 225 Chapter 11 part 1_Au - Cell division is a dynamic...

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Announcements Exam 1 redo and Dr. Chew debrief due now! LRQ Ch 11-12 due F 10/17 (complete on Sakai by 9 am) mitosis and meiosis study sheets due F 10/17 Photosynthesis lab report due T 10/21 Exam 2 - W 10/22 extra office hours today 1-3 pm, F 11-12 & 2-3 pm vote for Q&A Sakai chat session
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Cell division - Variations, regulation, and cancer Chapter 11 www.shirt.woot.com
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Outline Prokaryotic binary fission Eukaryotic cell division Mitosis Meiosis Genetic variation from cell division
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Prokaryotic cells divide (and reproduce) by binary fission
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Outline Prokaryotic binary fission Eukaryotic cell division Mitosis Meiosis Genetic variation from cell division
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Eukaryotic cell division is more complicated because cells are bigger and more complex
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Identical sister chromatids are produced by DNA replication and separate during mitosis Sister chromatids Chromosomes Centromere Chromosome duplication Sister chromatids Chromosome distribution to the daughter cells DNA molecules
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Mitosis is a small fraction of a cell’s time
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Unformatted text preview: Cell division is a dynamic, fluid process • Arbitrary division into stages makes it easier to discuss events – Prophase – Prometaphase – Metaphase – Anaphase – Telophase Outline • Prokaryotic binary fission • Eukaryotic cell division – Mitosis – Meiosis • Genetic variation from cell division Prophase Interphase Prometaphase Prometaphase Metaphase Anaphase Anaphase Telophase Cytokinesis Outline • Prokaryotic binary fission • Eukaryotic cell division – Mitosis – Meiosis • Genetic variation from cell division Be able to distinguish homologous chromosomes from sister chromatids Crossing over occurs in prophase I Meiosis produces haploid cells meiosis I = reductional division Meiosis produces haploid cells meiosis II = equational division Outline • Prokaryotic binary fission • Eukaryotic cell division – Mitosis – Meiosis • Genetic variation from cell division Mitosis and meiosis differ in several ways...
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