In fact, evolution can be seen every day in DNA studies mapping the occurrences and transmissions of mutations in everything from plants & animals to human beings.
When, precisely, all these observed mutations add up to separate races & breeds (i.e., dogs), sub-species, species, genera & families, etc. -- these are all matters of careful scientific definitions and debates.
For example, you might remember that Polar Bears & Brown Bears were recently reclassified from separate genera down to just separate species of the same genus.
Reason: it was discovered that Polar & Brown (Grizzly) Bears can and occasionally do interbreed in the wild.
By biological definition, natural interbreeding means they can still be separate species, but not different genera.
Your arguments here sound the same as those of the Global Warming Alarmists.