Q.

After transformation involving the insertionally inactivated coding sequence of enzyme β-galactosidase, the recombinant colonies should :

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a

appear in blue colour

b

do not in blue colour

c

Have active α-galactosidase 

d

appear in orange color

answer is B.

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Detailed Solution

Recombinant colonies with inactivated beta galactosidase gene appear colorless and those without insertion inactivation appear in blue color.

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