é. Colett 5. Figure 3 below illustrates the key chromosomal event of the cell di
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Question
é. Colett 5. Figure 3 below illustrates the key chromosomal event of the cell division process known as mitosis, which is the type of cell division that is used for asexual reproduction. The figure shows three different chromosomes being divided. sister chromatids daughter chromosomes spindle pole mitotic spindle Figure 3. Chromosome division during mitosis. Chromosomes attach to two sunburst-like arrays of fibers located on opposite sides of the cell. This structure is called the mitotic spindle. The spindle fibers are composed of microtubules, one of the elements of the cytoskeleton. Based on what is shown in Figure 3, define the term sister chromatids. What process would have had to occur before the time depicted in the image on the left in order to generate the sister chromatids? (Hint: see #2 above.) a. b. Judging from what is shown in Figure 3, what is the purpose of the mitotic spindle? How does it solve the problems you identified in Question 4? Note that the microtubules of the spindle are dynamic, in that they can lengthen and shorten; how would this help the spindle accomplish its purpose? Two cells that have the same genetic information are referred to as clones of each other. Are the cells that would result from the division shown in Figure 3 clones? c. 4Explanation / Answer
Answer 3 a). Sister chromatids refers to the two identical copies formed by the replication of a single chromosome, with both copies joined together by a common centromere and held together by proteins. Sister chromaids are generated by replication of the single chromosome in the S phase of the cell cycle.
Answer 3 b)The mitotic spindle helps in cell division by segregating chromosomes in two daughter cells. The lengthening and shortening of microtubules help the spidles to attach to both the chromatids through the kinetochore and pull them towards opposite poles to segregate them to two daughter cells.
Answer 3 c) Yes the cells resulting from division will have identical chromosome copy and thus would be clones.
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