What relatively recent scientific advancement has made mappi
     What relatively recent scientific advancement has made mapping by linkage or classical genetic mapping approaches virtually obsolete?  the use of synteny  negative interference  the inclusion of the X and Y chromosome in SNP experiments  positive interference  the genome sequence of a species 
  
  Solution
The answer is The use of synteny.
Synteny - physical co-localization of genetic loci on the same chromosome within an individual or species.

