Lecture_14_DulaiS09_Mitosis

Lecture_14_DulaiS09_Mitosis - Today's Goal Understand...

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Today Today s Goal s Goal • Understand Mitosis • Understand Mitosis • Understand Mitosis • Understand Mitosis • Understand Mitosis • Understand Mitosis & Reproduction
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How Cells Reproduce Chapter 8
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Reproduction •P a r e n t s produce a new generation of cells or multicelled individuals like themselves • Parents cells must provide daughter cells with hereditary instructions, encoded in DNA, and enough metabolic machinery to start up their own operation
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Cell Division Mechanisms - Comparison Prokaryotic organisms –Asexua l – Prokaryotic fission – Just split into 2 Eukaryotic organisms – Mitosis , increase in cell number – Meiosis – special cell division for sexual
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Roles of Mitosis – increase in cell number of the same type • Multicelled organisms –Growth ( Baby to Adult - with more cells ) – Cell replacement ( Intestine ) • Some protistans, fungi, plants, animals – Asexual reproduction – self propagation
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Meiosis - ignore • Functions only in sexual reproduction • gametes (sperm and eggs) or spores • FOR NEXT TIME…
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What is a Chromosome, Sir? •A SINGLE double-stranded DNA molecule & attached proteins • Must be duplicated in preparation for mitosis One chromosome (unduplicated) One chromosome (duplicated) one chromatid two sister chromatids one chromatid
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Chromosome Number • Sum total of chromosomes in a cell
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This note was uploaded on 11/18/2010 for the course SS 101 taught by Professor Denver during the Spring '10 term at Alabama.

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Lecture_14_DulaiS09_Mitosis - Today's Goal Understand...

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