The result of mitosis is that the daughter cells end up with the same number ofchromosomes that the parent cell had. Another potential way to maintain the number ofchromosomes would be to carry out cell division first and then duplicate the chromosomesin each daughter cell. Assess whether this would be an equally good way of organizing thecell cycle. Explain why evolution has not led to this alternative.
Question
The result of mitosis is that the daughter cells end up with the same number ofchromosomes that the parent cell had. Another potential way to maintain the number ofchromosomes would be to carry out cell division first and then duplicate the chromosomesin each daughter cell. Assess whether this would be an equally good way of organizing thecell cycle. Explain why evolution has not led to this alternative.
Solution
The proposed alternative method of cell division first and then duplicating the chromosomes in each daughter cell would not be an equally good way of organizing the cell cycle. This is due to several reasons:
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Accuracy: The current process of mitosis ensures that each daughter cell receives an exact copy of the parent cell's chromosomes. This is crucial for maintaining the genetic integrity of the cell. If the cell were to divide first and then duplicate the chromosomes, there would be a higher risk of errors occurring during the duplication process. These errors could lead to mutations, which could potentially be harmful.
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Energy Efficiency: The process of duplicating chromosomes is energy-intensive. By duplicating the chromosomes before cell division, the cell ensures that it only needs to go through this process once. If the cell were to divide first and then duplicate the chromosomes, it would need to expend twice as much energy.
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Timing: The cell cycle is a carefully timed process. The duplication of chromosomes occurs during the S phase of the cell cycle, which allows the cell enough time to repair any errors before moving on to cell division. If the cell were to divide first and then duplicate the chromosomes, it would disrupt this timing and potentially lead to errors.
Evolution has likely not led to this alternative because it would not be as efficient or accurate as the current process of mitosis. The current process ensures the genetic integrity of the cell, conserves energy, and allows for proper timing and error correction. Therefore, it is more advantageous for the cell and has been favored by natural selection.
Similar Questions
events in mitosis which ensure that the number of chromosomes in the daughter cells remain the same as that in the parent cell
What is the point of mitosis?Group of answer choicesTo produce two daughter cells with more DNA than the original cellsTo produce two genetically different daughter cellsTo produce two genetically identical daughter cellsTo produce two larger daughter cells
Students modeled the changes in cells during mitosis, using paper plates, flat wooden sticks, cotton swabs, and construction paper.Which statement correctly uses the model to explain how mitosis maintains genetic continuity?Crossing-over occurs in cell 4, which increases the genetic diversity in cells 6 and 7.The independent assortment that is represented in cell 2 ensures that cell 3 has the correct number ofchromosomes.When the nuclear membrane reforms in cell 5, each nucleus becomes diploid in number.The chromosomes in cell 1 are the same as in cells 6 and 7.
The cell cycle results in new identical daughter cells that can be used for growth, replacement, or repair.
It results in daughter cells with the same number of chromosome as the parent cell.Group of answer choicesboth mitosis and meiosisneither mitosis nor meiosismeiosismitosisNext
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