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Name: ____________________________Date: __________________Mitosis and Asexual Reproduction – Chapter 55.1 The Cell Cycle and MitosisDue to the loss and death of cells ______________________________. How many cells in your body? 50-100 million trillionEvery minute your body produces about __________________________________3693795571500Three stages in the cell cycle: 1. ____________________: cell carries out normal functions. 2. _______________________: nucleus contents duplicated and divided into two equal parts. 3. _____________________________: separation of two nuclei and cell contents into two daughter cells.Parts of the Cell Cycle InterphaseInterphase - the _____________________ cell cycle stage (lasts 15 hrs. – months). cell performs normal functions and grows. In late interphase, DNA copies itself in the process of _______________________. __________________________________ involves several steps:412623024320500The DNA molecule ______________ with the help of an _______________.New bases pair with the bases on the ______________________ DNA.Two new identical DNA molecules are produced. Now, ___________________the amount of DNA in nucleus _______________________Late Interphase continued _________________________ is in its ______________________________ form so that DNA can be copied into ________________ for proteins to be made in preparation for cell division.At the end of interphase, the cell _________________________________________ and make proteins in preparation for mitosis and cytokinesis.5191125-21907500ChromosomesAs the nucleus prepares to divide, replicated DNA in interphase joins to form _________________________________ joined by a __________________________. Mitosis Overview: Mitosis is the shortest stage of the cell cycle where the ________________, ___________________ and two _________________________________ are formed. It occurs in 4 stages: ____________________________________________________________________________________________________________________________________________465772516764000Helpful saying to remember the order:“I picked many apples today.”Mitosis - ProphaseChromosomes start to coil and become ________________________.Pairs of _________________________ start to separate. The ________________________________ disappears.____________________________________ start to form between the centriole pairs.Chromosomes move more evenly throughout the nucleus.44862751841500Mitosis - MetaphaseCentriole pairs move to ____________________________ of the cell.Spindle fibers are still attached to the centriole pairs.Chromosomes _____________________________________ ____________________ of the cell and are attached to the spindle fibers.4162425-19177000Mitosis - AnaphaseThe pair of ____________________________________ at the centromere and move to opposite ends of the spindle.Now there are ______________________ the number of chromosomes within the cell membrane.Movement of the chromosomes towards the opposite ends of the cell membrane is aided by the _________________ ____________________________________.41617904889500Mitosis - TelophaseNuclear membranes form around the __________________________________ of chromosomes.The spindle fiber disappears.Chromosomes start to uncoil (____________________) and become less visible.Cell starts to make a groove (_____________________) in the middle to eventually split into two identical cells.38671503429000CytokinesisThe division of material ___________ of the nucleus.Occurs after ______________________.Divides the organelles and other substances in the cytoplasm into roughly two equal halves.Animal cells furrow while plant cells form a _____ _____________# chromosomes in daughter cell _______________ the # chromosomes in parent cell. Daughter cells are ____________________________ to parent.Cell Cycle ProblemsCheckpoints in the cell cycle will prevent cell division if:If the cell is short of _________________________________If the DNA within the nucleus has _________________________________________If the _________________________________________________________Mutations in genes involving checkpoints can result in an out-of-control cell cycle. The result can be uncontrolled cell division: _________________________________Cancer cells have __________________________________________Cancer cells are not specialized, so they _____________________________Cancer cells attract blood vessels and grow into _____________________.80010015367000Cells from tumours can break away to other areas of the body ................
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