Use the Following to Answer Questions

Use the following to answer questions
You identify an RFLP in mice by digesting genomic DNA with HindIII enzyme and radiolabeling a piece of probe DNA. Southern blot analysis shows that the probe detects a 2-kb fragment in one strain of mice and a 4-kb fragment in another strain of mice. The two mice strains are crossed to produce an F₁ generation. Two F₁ siblings are mated to produce a dozen F₂ progeny. You isolate genomic DNA from several F₁ and F₂ individuals, digest with HindIII, and perform a Southern blot with the same probe.
-How many bands would be seen in the Southern blot of an F₂ individual?

A) one
B) two
C) three
D) four
E) one or two