Mitosis Lab Report Essay

1171 Words Nov 10th, 2012 5 Pages
Life Science Lab. A. Arnold Tuesdays @ 2:30
September 30th, 2011
Lab Report: Nuclear and Cell Division.
PART A: Stages of Mitosis in my own words. 1. Interphase: DNA has formed already, but it remains in the simple form of chromatin. Chromatins are structures that are loosely coiled in the cell.3 I also observed during my lab that this was the only stage where I could still see a nucleus and nucleolus intact within the cell; this is because it’s the only stage where the nuclear membrane has not broken apart yet to begin forming a new cell.3 2. Prophase: In this stage the chromatin converges to create rod shaped chromosomes. The nucleus and nucleolus cannot be seen anymore.3 3. Metaphase: Here the most noticeable change is
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Animal cells contain centrioles, which plant cells do not.5 The main difference observed between the two comes in the telophase stage before the cells split.5 Here, in animal cells a cleavage furrow forms where the cell splits, whereas with plants through the process of cytokinesis (which is the name for the actual splitting of cells in mitosis) the cell wall of the parent cell is extended to both new daughter cells.5 This process has to be different because animal cells do not have a cell wall, but plant cells do.5
PART C: List the Functions of Mitosis and Meiosis.
Functions of Mitosis 1. Tissue Growth6 2. Regeneration6 3. Asexual Reproduction6
Functions of Meiosis 1. Reproduction6 2. Increases genetic variability6
PART D: Questions from the Lab Manual. 1. “Is there a correlation between the number of chromosomes and the size of the organism?”
No, while the amount of chromosomes can differ from organism to organism, there is no direct correlation between the organism’s size and the amount of chromosomes they contain.6 2. “Are all chromosomes the same size?”
No, certain chromosomes are but not all chromosomes are the same size.7 3. “What can you infer as to the amount of genetic material per chromosome in the organisms listed in Chart 1 at the end of this exercise?”
To put it simply, there is really no correlation between amount of chromosomes and size or complexity

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