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After Crick and Watson proposed double helix structure for the DNA, three models for the DNA replication were proposed: conservative, semi conservative, and dispersive.

In conservative model, the first replication generates one daughter molecule containing both parental strands and another holding all new strands.

In the semi-conservative model, each parental strand is the template for new strand. Each daughter molecule has the parental strand and new strand.

In dispersive model, each parental strand is broken in double-stranded segments which act as templates for new molecules. The segments then reassemble in complete double helices, each with parental and new-fangled segments interspersed.

Assume you were the scientist evaluating such three models when they were first proposed. What would’ve been your hypothesis regarding which model was correct? Discuss

Which two models have same results after replication cycle 1?

Why were culture samples taken subsequent to each replication cycle?

Which model(s), if any, is ruled out by experimental results of the replication cycle 1? Discuss.

Which model is proved correct by experimental results of replication cycle 2? Discuss.

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  • Category:- Biology
  • Reference No.:- M914905

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