The Cell Cycle and Mitosis What is Mitosis? (Cell Division) 1. Mitosis: Asexual process where one cell (parent cell) splits into two identical daughter cells that each have a full set of chromosomes • For example, 1 human skin cell with 46 chromosomes divides into 2 skin cells with 46 chromosomes each Cell Division 2. Continuous process = happens non-stop for the entire life of the organism (except in certain cells, like nerves) 3. Daughter cells have same function, structure, and chromosomes number as parent cell (unless something goes wrong such as a mutation, which is a change in DNA). Important Vocabulary Words Chromosomes- organized, coiled piece of DNA containing an organismsʼ “genes” can see them in individual cells during most of the cellʼs life cycle chromosomes exits as stringy chromatin that is wrapped around histone proteins
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The Cell Cycle and MitosisWhat is Mitosis? (Cell Division)1. Mitosis:
Asexual process where one cell (parentcell) splits into two identical daughter cellsthat each have a full set of chromosomes
• For example, 1 human skin cell with 46chromosomes divides into 2 skin cells with 46chromosomes each
Cell Division2. Continuous process = happens non-stop for
the entire life of the organism (except in certaincells, like nerves)
3. Daughter cells have same function,structure, and chromosomes number asparent cell (unless something goes wrongsuch as a mutation, which is a change inDNA).
Important Vocabulary Words Chromosomes- organized, coiled piece of DNA
containing an organismsʼ “genes”
can see them in individual cells during most of thecellʼs life cycle
chromosomes exits as stringy chromatin that iswrapped around histone proteins
Vocabulary Cont… Centromere- Button that holds the sister
chromatids together.
Centrioles- small, dark, cylindricalstructure that aid in celll division. (onlyfound in animal cells)
Vocabulary Words Karotypes- a
speciesʼ“chromosomesmap”
Is used toidentifypotentialproblems.
Why do cells divide?1. Replace worn or damaged cells (except
nerve cells)
2. Growth/development
3. Cells need to stay small (so they can be efficientin importing / exporting, and maintaininghomeostasis)
4. Asexual Reproduction
The Cell CycleAll cells “time” their division using the Cell
Cycle
The cell cycle is the sequence of growthand division of a cell.