What is the effect of dna copying, which is not perfectly accurate, on the reproduction process? how does the amount of dna remain constant through each new generation is a combination of dna copies of two individuals?
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copy of DNA called replication. replication has not 100 percent accurate chemical reaction because of it variations occur. variations are the key source of evolution . always few errors are produced . these errors are responsible for bringing about variations. to co relate evolution with classification, we find great difference in the body design of primitive and advanced organisms. primitive organisms were having simple body structure whereas advanced organisms are too more complex
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Explanation:In the process of reproduction, if DNA copying is not perfectly accurate, variation occurs. These in turn may allow few individuals of a population to survive in an altered niche and becomes the basis of evolution and over time. Such variations are useful for the survival of species.
The combination of DNA copies of two individuals, (male and female) occurs during sexual reproduction. Reduction division (meiosis) during gamete formation halves the chromosome number in both male and female gametes. Since these two gametes fuse during fertilisation, the original number of chromosomes (as in the parent) is restored in the offspring. By this way the amount of DNA remains constant in each new generation.
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