2. Chromosomes & Cell Cycle

2. Chromosomes & Cell Cycle - Chromosomes, Cell Cycle,...

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Chromosomes, Cell Cycle, Mitosis, and Meiosis
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Cells Basic unit of life Essential link between generations Genomes Even simplest cell contains DNA, collectively called the organism’s genome Organized into genes
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Prokaryotic cells Circular DNA molecules Eukaryotic cells Chromosome packaging facilitated by histones Histones form nucleosomes Scaffolding proteins maintain chromosome structure
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How is DNA Organized in Cells? The total DNA in 1 cell in your body is ~6 ft. long That DNA is densely compacted and wrapped around histone proteins. This densely compacted DNA forms Chromosomes
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Structure of duplicated chromosome Pair of sister chromatids Contain identical DNA sequences Tightly associated in region of centromeres Each chromatid Includes region called centromere Kinetochore attached to each centromere
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Chromosome Long molecule of DNA 46 human chromosomes 23 pair Inherit 23 from each parent
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Each gene occupies a specific place, LOCUS , on a specific chromosome.
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2. Chromosomes & Cell Cycle - Chromosomes, Cell Cycle,...

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