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The DNA template used to repair the broken strand is the homologous chromosome inherited from the other parent. True or False? If False, explain why.

User MoPo
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Final answer:

False, The statement is generally false as the DNA template used to repair the broken strand during mitosis is usually the sister chromatid, not the homologous chromosome. However, during meiosis, the homologous chromosome can serve as a template for homologous recombination repair.

Step-by-step explanation:

The statement "The DNA template used to repair the broken strand is the homologous chromosome inherited from the other parent" is generally false. In the cell, damage to one of the two paired molecules of DNA can be repaired using a number of excision repair mechanisms which utilize the undamaged strand as a template. This is applicable when there is damage to only one strand of the DNA double helix.

However, in the case of homologous recombination, particularly during meiosis, the DNA template for repair can indeed come from the homologous chromosome, which could be inherited from the other parent. This is essential for repairing double-stranded breaks. During mitotic DNA replication, though, the sister chromatid, which is an identical copy formed during the replication process, often provides the template for repair, not the homologous chromosome.

User Dolev Dublon
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