What should be it's answer?
According to me it should be 2 and 3 both

What should be it's answer? According to me it should be 2 and 3 both (3) ii, iii, iv (4) ii, iii, iv, v Theoretically a normal phenotype is expressed when a particular substrate trasnform in to product but in which of following condition phenotype may be affected— (1) When the modified allele produce normal (2) When the modified allele produce a non functional enzyrne (3) When the unmodified allele produce no enzyme (4) All the above