While driving your rental car on your trip to europe, you find that you are getting 9.7 kilometers per liter of gasoline. what does this correspond to in miles per gallon?

As its name implies, an STR contains repeating units of a short (typically three- to four-nucleotide) DNA sequence. The number of repeats within an STR is referred to as an allele. For instance, the STR known as D7S820, found on chromosome 7, contains between 5 and 16 repeats of GATA. (From google) there might be more information there!!