18mitosis (1) - Lecture 18: The Cell Cycle Chapter 18:...

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Lecture 18: The Cell Cycle Chapter 18: Chromosomes and Cellular Division
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The Big Picture What do cells do ? What is the cell cycle ?
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Cell Overview What does a typical eukaryotic cell look like?
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Chromosomes Strand of protein used to organize and hold DNA in nucleus of eukaryotic cells Centromere: central region of chromosome important in chromosome replication
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Chromatin When cells are performing normal activities Required proteins are made DNA unzipped for transcription in indistinguishable mass
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Normal Activities Activities being done depends on the type of cell Nerve cells conduct signals Muscle cells move Etc…
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Chromatin When cells are preparing to divide Chromatin condenses into individual chromosomes
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Cellular Division One cell must split into two All cells contain the same DNA New cell must receive DNA Must make a copy ( I.e. DNA replication)
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Human Chromosomes Humans have 46 chromosomes (23 pairs) 22 identical pairs called autosomes 1 pair called sex chromosomes Contain genes that control gender development
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Males vs. Females Males have sex chromosomes X Y Females have sex chromosomes X X
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This note was uploaded on 12/08/2011 for the course PRE-HEALTH 1160 taught by Professor L.miani during the Spring '11 term at Niagara College.

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18mitosis (1) - Lecture 18: The Cell Cycle Chapter 18:...

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