question archive You will follow the movement of the chromosomes through mitosis to create somatic daughter cells
You will follow the movement of the chromosomes through mitosis to create somatic daughter cells
Subject:BiologyPrice: Bought3
You will follow the movement of the chromosomes through mitosis to create somatic daughter cells.PROCEDUREGenetic content is replicated during interphase. DNA exists as loose molecular strands called chromatin; it has not condensed to form chromosomes yet.Sister chromatids begin coiling into chromosomes during prophase. Begin your experiment here:1.Build a pair of replicated, homologous chromosomes. Ten beads should be used to create each individual sister chromatid (20 beads per chromosome pair). The 5-holed beads represent each centromere. See Figure 7 for a reference:Figure 7: Bead set-up. The blue beads represent one pair of sister chromatids and the black beads represent a second pair of sister chromatids. The black and blue pairs are homologous.a.Start with 20 beads of the same color to create first sister chromatid pair. Ten beads must be snapped together with a 5-holed bead in the center for each chromatid. This creates an "I" shape.b.Repeat Step 1a for a second chromatid.c.Connect the "I" shaped sister chromatids by the 5-holed beads to create an "X" shape.d.Repeat this process using 20 new beads (of a different color) to create the second sister chromatid pair. 2.Assemble a second pair of replicated sister chromatids. Use 12 beads, instead of 20, per pair (six beads per each complete sister chromatid strand). See Figure 8.Figure 8: Step 2 reference.3.Configure the chromosomes as they would appear in each of the stages of the cell cycle (prophase, metaphase, anaphase, telophase, and cytokinesis). Diagram the models for each stage in the section titled "Cell Cycle Division: Mitosis Diagram". Be sure to indicate the phase and number of chromosomes present in each cell for each phase.©eScience Labs, 2018
Cell Cycle Division: Mitosis Bead Diagrams
Cytokinesis
Post-Lab Questions
1. How many chromosomes were present before mitosis?
2. How many chromosomes did each of the daughter cells contain after mitosis?
3. Cite an example of a type of cell that undergoes mitosis. Why is it important for each daughter cell to contain information identical to the parent cell?
4. Human skin cells divide at a higher rate than neurons (nerve cells). Hypothesize why this may be.
5. Hypothesize what would happen if the sister chromatids did not split equally during anaphase of mitosis.
