The saying that DNA is like a blueprint of your body is misleading. The DNA does not specify what structures your body contains or how those structures are related to each other in space. A better analogy might be that the DNA is like a computer’s program.
The definition of a species, is an imprecise one because in reality the slow gradual change in organisms due to evolution blurs the lines.
February 12, 2016 is Darwin Day. Celebrate by learning about and appreciating the beauty of evolution by natural selection.