Biology Spec points covered Starter Practical activity Teacher-led activity CB2a Mitosis B2.1 Describe mitosis as part of Use a light microscope to look Model mitosis using Ask students to identify the cell cycle including the at mitosis in plant cells. Root clothes pegs with the what is needed for stages interphase, tip squashes are prepared as spring removed from humans to grow, and prophase, metaphase, part of the practical. the middle. To help establish the idea that anaphase and telophase describe the duplication new cells are important. and cytokinesis of chromosomes during Then ask students to Students should be able to B2.2 cell division, show identify the point where identify the different stages of Describe the importance of students the clothes growth stops. Challenge the cell cycle from the mitosis in growth, repair peg. From one side it them to say whether cell prepared slides or the slides and asexual reproduction will look like a division to produce new they have prepared B2.3 cells therefore stops at themselves. Describe the division of a chromosome’, but this point as well. Elicit cell by mitosis as the turned to the wider side the idea that although Equipment: If preparing own production of two daughter it will look like two adults do not grow in slides: garlic clove with roots, cells, each with identical chromatids, which can height, they still need to distilled water, paper towel, sets of chromosomes in the then be divided up into produce new cells. Tell microscope slides and nucleus to the parent cell, two separate students that new body coverslips, watch glass or and that this results in the chromosomes. cells are produced by a small dish, microscope with x formation of two genetically form of cell division, 100 and x400 magnifications, identical diploid body cells Digital resource: which we call mitosis. fine forceps, pencil with rubber B2.4 Mitosis video end, hollow glass block with Describe cancer as the few drops of hydrochloric acid, result of changes in cells toluidine blue stain in dropping that lead to uncontrolled bottle, soft tissue, beaker of cell division tap water, eye protection If using pre prepared slides: prepared and labelled slides of each phase of mitosis, microscopes with x100 and x400 magnifications Optional: digital microscope
Biology Spec points covered Starter Practical activity Teacher-led activity CB2a Mitosis B2.1 B2.2 B2.3 B2.4 Describe mitosis as part of the cell cycle including the stages interphase, prophase, metaphase, anaphase and telophase and cytokinesis Describe the importance of mitosis in growth, repair and asexual reproduction Describe the division of a cell by mitosis as the production of two daughter cells, each with identical sets of chromosomes in the nucleus to the parent cell, and that this results in the formation of two genetically identical diploid body cells Describe cancer as the result of changes in cells that lead to uncontrolled cell division Ask students to identify what is needed for humans to grow, and establish the idea that new cells are important. Then ask students to identify the point where growth stops. Challenge them to say whether cell division to produce new cells therefore stops at this point as well. Elicit the idea that although adults do not grow in height, they still need to produce new cells. Tell students that new body cells are produced by a form of cell division, which we call mitosis. Use a light microscope to look at mitosis in plant cells. Root tip squashes are prepared as part of the practical. Students should be able to identify the different stages of the cell cycle from the prepared slides or the slides they have prepared themselves. Equipment: If preparing own slides: garlic clove with roots, distilled water, paper towel, microscope slides and coverslips, watch glass or small dish, microscope with x 100 and x400 magnifications, fine forceps, pencil with rubber end, hollow glass block with few drops of hydrochloric acid, toluidine blue stain in dropping bottle, soft tissue, beaker of tap water, eye protection If using pre prepared slides: prepared and labelled slides of each phase of mitosis, microscopes with x100 and x400 magnifications Optional: digital microscope Model mitosis using clothes pegs with the spring removed from the middle. To help describe the duplication of chromosomes during cell division, show students the clothes peg. From one side it will look like a chromosome’, but turned to the wider side it will look like two chromatids, which can then be divided up into two separate chromosomes. Digital resource: Mitosis video
GCSE-9-1-Science-Term-2-detailed-planning-document.docx