"Science in Motion - DOC"
Science in Motion Ursinus College Mitosis and the Cell Cycle “Breaking Up Is Hard To Do” Teacher Notes Time to complete lab: If students are familiar with the digital microscopes, this lab should take one 45 minute period. Target level: This would be a high school biology lab that could be modified for any level. It should come at the end of the unit on mitosis and the cell cycle. Objective: The purpose of this lab is to be a culminating activity for the cell cycle. Students are expected to come to this lab with a knowledge of the stages cells go through, the events that happen in each stage and an idealized idea of what these stages should look like based on diagrams. This lab gives them the opportunity to apply that previous knowledge to identify those stages in actual plant and animal cells. The addition of the digital microscopes has several advantages. Since the images can be seen on a screen, instructors can easily aid and instruct students in what they are looking for. Also, the ability to collect, organize, and print pictures of stages takes what is often a boring lab and makes it exciting. Major Concepts: Students should be made aware that cells flow from one stage to the next. Therefore many cells may be transitioning between stages and students to search, possibly through hundreds of cells, looking for cells that best illustrate the various stages. Students should also be made aware that most cells will be in interphase and other stages may be difficult to find. Evaluation: The wonderful thing about this lab is that it is easy to evaluate. It is easy to scan through the pictures and see whether the students have found the right things and if not, to see what they were looking at. Depending on the level of the class, and the quality of the slides, some students may not be able to find all the stages especially with the whitefish. Teachers will have to monitor and adjust. Extension: Teachers may want to have their students label visible cell structures. Teachers could also have students estimate the time the cell spends in different stages based on the frequency students find that stage.