Deletions in chromosomes give the following data

Q. Deletions in chromosomes give the following data-

Region of deletion Gene A activity

A1                                           +++

A2                                           ++

A3                                           +

A4                                           +++

A5                                           +++

Where is the gene located?

A.            A1

B.            Within A2 and A3

C.            Within A4 and A5

D.            Between A3 and A4

.Answer: Within A2 and A3