Mitosis 4 2023 Lecture Notes (PDF)
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Uploaded by ahmedsafaa
University of Al-Ameed College of Medicine
MSc. Zainab. R. Radhi
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Summary
This document is a lecture on mitosis, covering cell division in detail. It discusses the different phases of mitosis, including prophase, metaphase, anaphase, and telophase, as well as cytokinesis. The document is intended for biology students.
Full Transcript
University of Al-Ameed College of Medicine Department of anatomy and histology Mitosis MSc. Zainab. R. Radhi Cell Division • Tow kinds of cell division: • 1. Mitosis : division of somatic cells • 2. Meiosis: creation of new gametes (sex cell) Cell Division by meiosis sperm cells human egg cel...
University of Al-Ameed College of Medicine Department of anatomy and histology Mitosis MSc. Zainab. R. Radhi Cell Division • Tow kinds of cell division: • 1. Mitosis : division of somatic cells • 2. Meiosis: creation of new gametes (sex cell) Cell Division by meiosis sperm cells human egg cell Cell Division by mitosis • Some cells divide constantly: cells in the embryo, skin cells, gut lining cells, etc. epithelial cells intestine cells 7 week embryo Mitosis • Mitosis is a cell division process which results in two daughter cells having the same number and kind of chromosomes as the parent cell. • Human body cells have 46 ( 2n diploid ) chromosomes. The cell cycle • The cell cycle is the sequence of growth and division of a cell. • The majority of a cell’s life is spent in the growth period known as interphase. phases of mitosis • 4 phases of nuclear division (mitosis), directed by the cell’s DNA (PMAT) Prophase • Chromosomes coil up • Nuclear envelope disappears • Spindle fibers form Metaphase • Chromosomes line up in middle of cell • Spindle fibers connect to chromosomes Metaphase Anaphase • Chromosome copies divide • Spindle fibers pull chromosomes to opposite poles Anaphase Telophase • Chromosomes uncoil • Nuclear envelopes form • 2 new nuclei are formed • Spindle fibers disappear Telophase Cytokinesis — the division of the rest of the cell (cytoplasm and organelles) after the nucleus divides In animal cells the cytoplasm pinches in In plant cells a cell plate forms After mitosis and cytokinesis, the cell returns to Interphase to continue to grow and perform regular cell activities Name the phases starting at the top. Thank you click here mitosis 3d animation |Phases of mitosis|cell division
