Final answer:
A dog sniffing organic material does not result in the DNA from that material integrating into the dog's genome.
Step-by-step explanation:
When a dog sniffs up organic material containing DNA, such as plants, soil, or animal waste, the DNA in this material does not integrate into the dog’s genome. The dog’s olfactory system is quite sensitive and can detect a wide range of scents due to a high number of functional genes related to olfactory receptors, but sniffing does not result in genetic alteration.
DNA is the genetic material passed from parent to offspring and is protected within cells. A dog's genome is a complete map of its DNA, and just like with other organisms, genetic inheritance is the only natural method by which a dog can acquire its genome.
Understanding how DNA works has allowed scientists to appreciate the genetic diversity and evolution of species like dogs. For example, studies on ancient dogs reveal that humans have been purposefully breeding dogs, and others indicate that dogs might have interbred with American wolves.