You cut the DNA with one type of restriction enzyme, and do a Southern blot. You probe the DNA with the 300 base pairs found at the end of the Xmas retrovirus, and see the following. You find that both have a 500 base pair incomplete coding region that is flanked by a direct repeat of 300 base pairs. You must explain the different bands on the gel above. Elf 4 is very rich.
Elves are diploid.
In the first trial the following Southern blot was performed. The DNA from each source indicated was digested with the same restriction enzyme. The radioactive probe was a piece of repetitive DNA found only on chromosome 1 and 2. Hence no dough. Pa are the parents of F1-1.