CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the percentage of cells in a sample that are undergoing mitosis
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the percentage of cells in a sample that are undergoing meiosis
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the percentage of cells in a sample that have cancer
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the percentage of cells in a sample that are in apoptosis
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Detailed explanation-1: -The mitotic index is a measure of cellular proliferation. It is defined as the percentage of cells undergoing mitosis in a given population of cells. Mitosis is the division of somatic cells into two daughter cells. Durations of the cell cycle and mitosis vary in different cell types.
Detailed explanation-2: -In a population of cells, the ratio of the number of cells undergoing mitosis (cell division) to the number of cells not undergoing mitosis.
Detailed explanation-3: -The sequence of events is divided into prophase (including prophase and prometaphase), metaphase, anaphase, and telophase. Mitosis accounts for about 10 percent of the cell cycle (may last only one to two hours) and is much shorter than the interphase.
Detailed explanation-4: -In fact, interphase takes up about 90% of a cell’s life. That leaves just 10% for mitosis! Cell before mitosis showing the location of the centrioles, microtubules, nuclear membrane, nucleolus, and DNA (Let’s Talk Science using an image by Aldona via iStockphoto). Interphase has three stages: G1, S and G2.