Lab8_OCON - Caroline OConnor Cell Physiology Lab 8 T.A....

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Caroline O’Connor Cell Physiology Lab 8 T.A. James Peterson Title: Onion Root Mitosis 1.) The phase that appeared to be the longest was interphase, during which we observed the largest number of cells. The cells were characterized by an intact nuclear membrane, absence of a mitotic spindle, and diffuse chromatin. The phase that appeared to be the shorted was telophase, during which we observed the smallest number of cells. The cells in telophase had their chromosomes at almost opposite ends of the cell, and a cleavage furrow was evident between the chromosomes. 2.) As we moved from the apical meristem to the zone of elongation, the mitotic index decreased. The root cap typically contains few mitotic cells due to damage. The apical meristem is the portion of the root that is undergoing active mitosis, has the most cells undergoing mitosis, and has the highest mitotic index. The zone of elongation contains the newly formed cells that are greater and size and length. Therefore, the decrease in
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This note was uploaded on 08/11/2010 for the course IPHY 3060 taught by Professor Allen,davi during the Fall '09 term at Colorado.

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