Lecture 8

Lecture 8 - Lecture 8 Chromosome o Wound up double helix To...

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Lecture 8 Chromosome o Wound up double helix To maintain chromosome # o What mitosis is all about! o A single chromosome is duplicated and then the sister chromatids are separated Mitosis o Nuclear division after interphase o Usually followed by cytoplasmic division o 4 stages Prophase Early prophase: duplicated chromosomes are starting to condense Late prophase: further condense, microtubules assemble, 1 centrosome moves towards each pole Nuclear envelope breaks up Transition to metaphase o Bi-polar spindle forms o Microtubules attach to chromatids Metaphase Chromosomes align at the equator Centromeres divide Chromosomes become single-stranded Anaphase Sister chromatids pulled apart by shortening microtubules Chromosomes move toward poles Cytokinesis begins marking the end of anaphase Telophase Cleavage furrow splits the cell into two Chromosomes decondense 2 nuclear membranes from around single-stranded chromosomes
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This document was uploaded on 10/26/2011 for the course BIOL 101 at UNC.

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Lecture 8 - Lecture 8 Chromosome o Wound up double helix To...

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