A)PCR
B)The yeast two-hybrid system
C)Restriction mapping
D)RT-PCR
E)Southern blotting

A)changes in the number of tandem repeats.
B)base changes that add or delete restriction enzyme recognition sites.
C)addition or deletion of bases between restriction enzyme recognition sites.
D)B and C only
E)All of these

A)binding to the lacZ operator,preventing transcription.
B)binding to RNA polymerase,preventing transcription.
C)binding to the lacZ repressor,enabling transcription.
D)binding to the lacZ upstream activator sequence,enabling transcription.
E)changing color in the presence of X-gal.