The diagram given below shows a method of screening the transformed bacterial cells. Explain how the differently coloured colonies help in identifying the transformed cells.

Question

TextSelection of Transformants in Genetic Engineering

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Identify the selectable markers labelled as 'a' and 'b' in the given diagram of E. coli vector.

How is coding sequence of enzyme β-galactosidase considered a better marker than the ones identified by you in the diagram ? Explain.

Selection of Transformants in Genetic Engineering