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2005_campbl12

2005_campbl12 - 1 Chapter 12 The Cell Cycle Important Point...

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Unformatted text preview: 1 Chapter 12: The Cell Cycle Important Point: Chromosome Sorting ¡ The goal of cell division typically is to equally partition two more-or-less identical copies of genetic material between two daughter cells ¡ Prokaryotes are comparatively simple, with only one chromosome, so have a relatively easy time sorting daughter chromosomes to daughter cells ¡ Eukaryotes, with their longer DNA and multiple chromosomes, don’t have it nearly so easy ¡ Much of the complex “dance” of Mitosis is a consequence of the need to make sure that each daughter cell ends up with the same number and type of chromosomes as the parent Cell Division Chromosome, Bacterial Chromosomes, Eukaryote Here “chromosome” and “DNA” are not 100% synonymous 2 Chromosomes vs. Chromatin Chromosomes • Tightly packaged DNA • Found only during cell division • DNA is not being used for macromolecule synthesis Chromatin • Unwound DNA • Found throughout Interphase • DNA is being used for macromolecule synthesis Chromosomes, Eukaryote Though chromosomes are “all about” DNA, in fact much this structure consists of protein Form via replication, not by formed chromatids coming together How Long is a Chromatid a Chromatid?...
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2005_campbl12 - 1 Chapter 12 The Cell Cycle Important Point...

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