BIO152H5 Chapter Notes - Chapter 12: Sister Chromatids, Cell Cycle, Cell Division

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20 Oct 2018
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Chapter 12 review: unicellular organisms reproduce by cell division; multicellular organisms depend on cell division for their development from a fertilized egg and for growth and repair. Cell division is part of the cell cycle, an ordered sequence of events in the life of a cell from its origin until it divides into daughter cells. Most cell division results in genetically identical daughter cells (pp. 244 246: the genetic material (dna) of a cell its genome is partitioned among chromosomes. Each eukaryotic chromosome consists of one dna molecule associated with many proteins that maintain chromosome structure and help control the activity of genes. Together, the complex of dna and associated proteins is called chromatin. The chromatin of a chromosome exists in different states of condensation at different times. In animals, gametes have one set of chromosomes and somatic cells have two sets: cells replicate their genetic material before they divide, each daughter cell receiving a copy of the dna.

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