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During anaphasic movements of chromosomes, ______ of each chromosome is/are towards the pole and _____ of the chromosome trail(s) behind.
- a)Centromere, arms
- b)Arms, centromere
- c)Chromatids, centromere
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
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During anaphasic movements of chromosomes, ______ of each chromosome i...
In anaphasic movement of chromosomes, the centromeres lead the path while the arms trail behind. As a result the anaphasic chromosomes appear V., L, J- and I-shaped. The shapes are formed respectively in metacentric, submetacentric, acrocentric and telocentric chromosomes.
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During anaphasic movements of chromosomes, ______ of each chromosome i...
During anaphasic movements of chromosomes, the centromere of each chromosome moves towards the pole, while the arms of the chromosomes trail behind. This movement ensures the proper segregation of chromosomes during cell division.
Explanation:
1. Anaphase of mitosis:
- Anaphase is the stage of mitosis in which the sister chromatids separate and move towards opposite poles of the cell.
- The movement of chromosomes during anaphase is facilitated by the spindle fibers, which attach to the centromere region of the chromosomes.
- The spindle fibers exert force on the centromere, pulling the sister chromatids apart.
2. Movement of centromere:
- The centromere is the region of the chromosome where sister chromatids are held together.
- During anaphase, the spindle fibers contract, causing the centromere to split.
- The spindle fibers then pull the sister chromatids towards opposite poles of the cell.
- As a result, the centromere moves towards the pole to which the sister chromatids are being pulled.
3. Movement of chromosome arms:
- The arms of the chromosomes, which contain genetic material, trail behind during anaphase.
- The movement of the chromosome arms is not as rapid as that of the centromere.
- The trailing chromosome arms eventually catch up with the centromere and reach the opposite pole of the cell.
4. Significance of anaphasic movements:
- The anaphasic movements ensure the proper segregation of chromosomes into the daughter cells during cell division.
- By pulling the sister chromatids towards opposite poles, the chromosomes are evenly distributed between the two daughter cells.
- This ensures that each daughter cell receives the correct number of chromosomes and genetic material.
In summary, during anaphasic movements of chromosomes, the centromere of each chromosome moves towards the pole, while the arms of the chromosomes trail behind. This movement ensures the proper segregation of chromosomes during cell division, leading to the formation of two daughter cells with the correct number of chromosomes.
Explanation:
1. Anaphase of mitosis:
- Anaphase is the stage of mitosis in which the sister chromatids separate and move towards opposite poles of the cell.
- The movement of chromosomes during anaphase is facilitated by the spindle fibers, which attach to the centromere region of the chromosomes.
- The spindle fibers exert force on the centromere, pulling the sister chromatids apart.
2. Movement of centromere:
- The centromere is the region of the chromosome where sister chromatids are held together.
- During anaphase, the spindle fibers contract, causing the centromere to split.
- The spindle fibers then pull the sister chromatids towards opposite poles of the cell.
- As a result, the centromere moves towards the pole to which the sister chromatids are being pulled.
3. Movement of chromosome arms:
- The arms of the chromosomes, which contain genetic material, trail behind during anaphase.
- The movement of the chromosome arms is not as rapid as that of the centromere.
- The trailing chromosome arms eventually catch up with the centromere and reach the opposite pole of the cell.
4. Significance of anaphasic movements:
- The anaphasic movements ensure the proper segregation of chromosomes into the daughter cells during cell division.
- By pulling the sister chromatids towards opposite poles, the chromosomes are evenly distributed between the two daughter cells.
- This ensures that each daughter cell receives the correct number of chromosomes and genetic material.
In summary, during anaphasic movements of chromosomes, the centromere of each chromosome moves towards the pole, while the arms of the chromosomes trail behind. This movement ensures the proper segregation of chromosomes during cell division, leading to the formation of two daughter cells with the correct number of chromosomes.
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During anaphasic movements of chromosomes, ______ of each chromosome is/are towards the pole and _____ of the chromosome trail(s) behind.a)Centromere, armsb)Arms, centromerec)Chromatids, centromered)None of theseCorrect answer is option 'A'. Can you explain this answer?
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