Researchers combined sequences of fruit-fly DNA from a gene for a particular trait with frog DNA. The mixture was heated to separate the DNA strands. Cooling allowed the single strands
to form pairs. The researchers observed that some of the fruit-fly DNA paired with frog DNA.
Fruit fly
Recombined fruit-fly
and frog sequence
DNA sequence
from a gene
Frog
Strands separate when
mixed and heated
Frog DNA