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BIOL 239 (290)
Lecture

Mitosis.docx

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Department
Biology
Course
BIOL 239
Professor
Heidi Engelhardt
Semester
Summer

Description
Mitosis  The cell cycle o The repeating pattern of cell growth, mitosis and cell division is called the Cell Cycle  Mitosis o The process of nuclear division in cells that produces daughter cells that are genetically identical to each other  The nucleus o Chromatin – the complex of DNA and protein found in a cell’s nucleus  Gap 1 o period in cell cycle when cells are actively producing many of the products specific to their biological role in the body. o G1 varies in length, depending on cell type  e.g., mature human nerve cells do not divide - G1 is the only phase = G0 o skin stem cells divide rapidly to provide a continuous supply of keratinocytes that form the outer surface  Synthesis phase o duplication (synthesis) of chromosomes (DNA) to produce identical sister chromatids o sister chromatids remain joined at the centromere  Metaphase chromosomes
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