Cell Processes: Mitosis and Meiosis – Teacher’s Guide Procedure Tips
Kit # 3674-07
Part 1 – Structured INQUIRY MATERIALS needed PER LAB GROUP
‹ When performing this lab activity, all data should be recorded in a lab notebook. You will need to construct your own data tables, where appropriate, in order to accurately capture the data from the investigation.
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‹ If directed to do so by your teacher, this part of the lab may be done at the same time as Part 2 of the lab.
Part 1a – PROCEDURE: modeling mitosis
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Red pop beads Pink pop beads ‹ Clear plastic cetrioles Magnetic yellow centromeres
please fix/edi list for this all parts of this activity or remove completely
Using the pop beads (red and pink), the magnetic yellow centomeres, and the clear plastic centrioles, simulate each stage of mitosis. To simulate Interphase – DNA replication: 1. Construct two strands of seven red pop beads and attach each strand to a yellow centromere. Repeat with two strands of seven pink pop beads and a yellow centromere. These will represent a homologous pair of chromosomes (red from the father and pink from the mother). 2. Picture an imaginary boundary in the center of your desk. This boundary will represent the nuclear membrane. Place the chromosomes in the center of the imaginary nucleus. 3. DNA replication occurs, producing a duplicate of each chromosome. Construct two chromosomes identical to the ones you made previously. Each of the duplicated chromosomes is called a chromatid. Join both red chromatids at the centromere to form a pair of sister chromatids. Repeat this process for the pink chromosome. 4. Place a pair of plastic centrioles, at a ninety degree angle, just outside of your nuclear membrane. The centrioles also replicated during interphase, so place another pair next to them in your cell. ‹
TIP: It may be helpful to tape your centrioles together during the exercise.
5. Illustrate your simulation of interphase and in your own words provide a brief description of what happens during interphase.
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