Question

Explain : Biochemical evidences for DNA as a genetic material.

Answer 1

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Genetic material must be able to enter the next generation, then, it can pass the traits to the next generation. Only the head of the sperm can become part of the zygote. And, the major part of the head of the sperm is the cell nucleus. There is almost no cytoplasm. But the major constituent of the head is DNA. Therefore, DNA would be the genetic material.(b)If all cells contain the same set of genetic material, then, the amount of genetic material in each cell should be the same. Scientists proved that the amount of DNA in any body cell of the same individual is the same.(c)Theoretically, the mass of DNA in a diploid
cell should be a double of that of the haploid cell. Also, scientist proved that the above hypothesis is true.(d)Anything that can change DNA should be able to cause change in genetic trait.



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