The drastic phenotypic differences between large dogs, such as Bloodhounds, and small dogs, such as Chihuahuas, are a result of

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The drastic phenotypic differences between large dogs, such as Bloodhounds, and small dogs, such as Chihuahuas, are a result of artificial selection. Dogs were purposely bred by humans to exhibit specific traits and characteristics, resulting in the development of different dog breeds with distinct physical and behavioral characteristics.

The Drastic Phenotypic Differences Between Large Dogs, Such as Bloodhounds