What is the process of mitosis and cytokinesis?
Cytokinesis is the physical process of cell division, which divides the cytoplasm of a parental cell into two daughter cells. It occurs concurrently with two types of nuclear division called mitosis and meiosis, which occur in animal cells.
Can you see mitosis with a light microscope?
This is accomplished in a Eukaryote through mitosis. In this lab you will use the light microscope to view cells at different stages of mitosis as well as the division of the cell called cytokinesis. Focusing the microscope with 40x objective should give you a close enough view of the chromosomes to find each phase.
What does cytokinesis look like?
The first visible change of cytokinesis in an animal cell is the sudden appearance of a pucker, or cleavage furrow, on the cell surface. The furrow rapidly deepens and spreads around the cell until it completely divides the cell in two.
How do you identify mitosis and meiosis?
Mitosis results in two nuclei that are identical to the original nucleus. Meiosis, on the other hand, results in four nuclei that each has ½ the chromosomes of the original cell. In animals, meiosis only occurs in the cells that give rise to the sex cells (gametes), i.e., the egg and the sperm.
What stage in mitosis is frequently observed?
Knowing this, metaphase is one of the most frequently observed stages of mitosis as this is the stage that the cell organizes its chromosomes along the metaphase plate (i.e, the equator of the cell). Many cells will reach this stage, but not continue to complete mitosis as the cell cycle is controlled in checkpoints.
Which stage of mitosis is the shortest?
anaphase
In anaphase, the shortest stage of mitosis, the sister chromatids break apart, and the chromosomes begin moving to opposite ends of the cell. By the end of anaphase, the 2 halves of the cell have an equivalent collection of chromosomes.
Do you use interphase or cytokinesis in mitosis?
While technically not a phase of mitosis, you may use “interphase” for some of the cells, but you should not use “cytokinesis.” Hold the slide of the onion root up to the light and note that there are several longitudinal sections on the slide.
Why do we make errors in observing mitosis?
In our data, we saw some errors, particularly in metaphase anaphase, and telophase. This can be explained by the slice of the cells on the slide not providing enough information or human error, because we often confused telophase with interphase if the cells were near the end of telophase.
Which is the best way to observe mitosis?
Methods: 1. Get a microscope and set it to the low power objective. 2. Set up the onion root tip slide on the stage of the microscope. 3.Continue focusing the lens and centering the root tip and switch the microscope to the high power objective. 4. Observe and count the cells in each phase in the cross section.
Why are whitefish blastula and onion root tips used to study mitosis?
However, the cell has not yet divided. 2.)Explain why whitefish blastula and onion root tips are selected for a study of mitosis. *The whitefish blastula is used because the rapid growth of cells and frequent cell division allows for observation of the various phases of mitosis.