DNA renaturation experiments are useful strategies to estimate
the (there may be more than one right answer)
-size of an orgainism's genome
-number of single nucleotide differences between two species
-proportion of GC content in an organism's genome
-genetic relatedness between two species
Answer
The most appropriate answer is "genetic relatedness between two
specie".
Proportion of GC content can be estimated through denaturation
experiment, not renaturation. Size of an organism does not
correspond to the renaturation process.