Need help with genetics restriction mapping?

Question

my assignment is to draw a restriction map of the fragment and show distances, in base pairs, between HindIII, SmaI, and EcoRI.
A 1000bp EcoRI restriction fragment (linear) contains a gene you are interested in. first, construct a restriction map of the fragment using the enzymes SmaI & HindIII.
HindIII cut at 700bp & 300bp; SmaI cut at 800 & 200.

Answer 1

It is particularly helpful in chopping copies of tandemly arranged copies of a gene. For example, you can get restriction fragments of ribosomal RNA genes resident in the nucleolus. You can measure the lengths of various restriction fragments in the EM.