the Whitefish Blastula
Introduction
While the onion root cells tend to be arrang
the Whitefish Blastula
Introduction
While the onion root cells tend to be arranged in a planar fashion, the whitefish blastula is more spherical. As a result, the whitefish cells are oriented in a less orderly fashion than the regular, patterned. When a section is cut from the blastula, some mitotic figures will be visible and familiar, as in the root tip, but other cells will be cut so that many mitotic figures may have an unfamiliar or atypical appearance. Disregard these and concentrate on those which can be seen in full view. As a result, finding each stage of mitosis may require more searching in the whitefish blastula.
Materials
1. Compound microscope
2. Prepared slide of whitefish blastula
Procedure
1. In Figure 6, identify the phase of mitosis and write the name of the phase below each diagram. The cells go in the appropriate temporal sequence through cell cycle and you are likely to use the same term multiple times. While technically not a phase of mitosis, you may use “interphase” for some of the cells, but you should not use “cytokinesis.”
2. Hold the slide of the whitefish blastula to the light and note that there are a number of sections on the slide. Examine all sections on the slide using high power to locate all the phases of mitosis.
3. Find each phase of mitosis on the slide. As you locate each phase, your instructor will verify that you are correct and initial your paper. After you have received verification from your instructor, draw the cell in Table 1.
QUESTION 3: