Cell Cycle, Meiosis, and Differentiation
Cell Cycle and Differentiation Study Guide
I. Cell Cycle – Notes and PowerPoint on my website.
Stage I – Interphase – longest stage; normal cell activity; chromatin doubles
Stage II – Mitosis – 4 phases: prophase, metaphase, anaphase, telophase
Stage III – Cytokinesis – cytoplasm separates to form two new cells
II. Mitosis - Notes and PowerPoint on my website.
• State the purpose of mitosis.___________________________________________________________________________
___________________________________________________________________________
• Give the names of the steps of mitosis in the correct order.
▪ P = Prophase: chromosomes become visible; spindle begins
▪ M = Metaphase: chromosomes in Middle of cell on spindle
▪ A = Anaphase: chromosomes pull Apart
▪ T = Telophase: Two nuclei form
• Recognize drawings of each stage and be able to put drawings into the correct order.
• Recognize errors in mitosis drawings and be able to correct them.
IV. Differentiation- Use Reading Assignment/Questions
• Even though all the cells in any one individual have the same set of chromosomes, cells have different structures and functions. Liver cells filter out alcohol and other poisons; heart cells beat; stomach cells produce acid and digestive enzymes, etc.
• Scientists theorize that not all genes are active in each cell. Once a cell somehow determines what its job will be, sections of the chromosomes turn off permanently and are not used again.
• A full set of chromosomes must always be copied during mitosis because the information for any one type of cell may be scattered over many chromosomes. In order for the daughter cells to do the same job as the parent cell, a full set of chromosomes is needed.
VII. Vocabulary- The following vocabulary plus flash cards
• Differentiation = the process by which cells become different from each other and have special functions
• Specialized cell = a cell with its own structure (shape) and function (job); cannot be any other kind of cell
• Stem cells = cells which are unspecialized and can therefore become any kind of cell.
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