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Guide Questions: 1. Why does chromosomes move and align themselves at the center of the cell during metaphase? 2. What happens to the spindle fibers during anaphase? Why? 3. Why is mitosis important?

Guide Questions: 1. Why does chromosomes move and align themselves at the center of the cell during metaphase? 2. What happens to the spindle fibers during anaphase? Why? 3. Why is mitosis important?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Guide Questions: 1. Why does chromosomes move and align themselves at the center of the cell during metaphase? 2. What happens to the spindle fibers during anaphase? Why? 3. Why is mitosis important? Mitosis is a type of cell division in which the nucleus of the cell divides (karyokinesis) into two (2) nuclei with identical genetic material. The resulting two daughter cells have the same number of chromosomes similar to the parent cell. Mitosis is used by multicellular organisms for growth and development, repair of tissues, and in asexual reproduction. It is divided into four (4) stages: Prophase, Metaphase, Anaphase and Telophase. During Prophase, the chromosomes in the nucleus condense. The nuclear membrane and nucleolus break into fragments and disappear. A part of the chromosome's centromere attaches to spindle fiber, and the spindle fibers begin to move the sister chromatids toward the center of the cell. During Metaphase, the chromosomes are pulled to the center of the cell where they line up on an imaginary line called metaphase plate. As the metaphase end, Anaphase begins. During this phase, the spindle fibers pull one set of chromatids toward one pole and the other set toward the opposite pole. Anaphase ends when the two sets of daughter chromosomes are located at opposite poles of the cell. The last phase of mitosis is Telophase. During this phase, the chromosomes uncoil, and nuclear membrane begins to form. After the division of the nucleus (karyokinesis), the cytoplasm will start to divide by a process called Cytokinesis, and two daughter cells are formed.
Transcribed Image Text:Guide Questions: 1. Why does chromosomes move and align themselves at the center of the cell during metaphase? 2. What happens to the spindle fibers during anaphase? Why? 3. Why is mitosis important? Mitosis is a type of cell division in which the nucleus of the cell divides (karyokinesis) into two (2) nuclei with identical genetic material. The resulting two daughter cells have the same number of chromosomes similar to the parent cell. Mitosis is used by multicellular organisms for growth and development, repair of tissues, and in asexual reproduction. It is divided into four (4) stages: Prophase, Metaphase, Anaphase and Telophase. During Prophase, the chromosomes in the nucleus condense. The nuclear membrane and nucleolus break into fragments and disappear. A part of the chromosome's centromere attaches to spindle fiber, and the spindle fibers begin to move the sister chromatids toward the center of the cell. During Metaphase, the chromosomes are pulled to the center of the cell where they line up on an imaginary line called metaphase plate. As the metaphase end, Anaphase begins. During this phase, the spindle fibers pull one set of chromatids toward one pole and the other set toward the opposite pole. Anaphase ends when the two sets of daughter chromosomes are located at opposite poles of the cell. The last phase of mitosis is Telophase. During this phase, the chromosomes uncoil, and nuclear membrane begins to form. After the division of the nucleus (karyokinesis), the cytoplasm will start to divide by a process called Cytokinesis, and two daughter cells are formed.
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