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Complex Traits

Author(s): Nancy Moreno, PhD.

Domestic Dogs: More than 190 Breeds

Procedure (cont.)

4. Ask students to identify the ways in which the different kinds of dogs shown differ in appearance [body size and shape; head shape; coat length, color and curliness]. Tell students that modern dogs provide an interesting model for learning genetics, because humans selected desirable dogs to breed—based on the parent dogs’ appearance or behaviors. This process over many generations, and many crosses, led to the different kinds of dog breeds.

*Note: In 2016, the American Kennel Club recognized 190 breeds, while the Westminster Kennel Club recognized 199 breeds.

Dog breeds shown above are listed below in order from left to right.

Top row (L-R): Toy poodle, English Bulldog, English Cocker Spaniel, Schipperke, Shetland Sheepdog, and Yorkshire Terrier.

Bottom row (L-R): Old English Sheepdog, Weimaraner, Spanish Water Dog, and Scottish Deerhound.

Funded by the following grant(s)

Science Education Partnership Award, NIH

Gene U: Inquiry-based Genomics Learning Experiences for Teachers and Students
Grant Number: 5R25OD011134

Robert Wood Johnson Foundation

Using Learning Technology to Build Human Capital
Grant Number: 57363