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Theoritically a normal phenotype is expr...

Theoritically a normal phenotype is expressed when a particalular substarte transform in to product but in which of following conditon phenotype may be affected-

A

When the modified allele produce normal enzyme

B

When the modified allele produce a non-functional enzyme

C

When the unmodified allele produce no enzyme

D

All the above

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The correct Answer is:
B
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