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... shows the wide range of dog breed sizes created using selective breeding. Selective breeding transformed teosinte's few fruitcases (left) into modern maize's rows of exposed kernels (right). Selective breeding (also called artificial selection ) is the process by which humans use animal ...


Sep 16, 2010 ... In the same way that inbreeding among human populations can increase the frequency of normally rare genes that cause diseases, the ...


Aug 29, 2013 ... There are over 400 breeds of dog in the world and all are maintained as pure- bred stocks through selective breeding, which aims to maintain a ...


Breeding dogs for particular characteristics, or phenotypes, has been going on ... came a relaxation of selective forces typical of nature (forces that continued in ...


Jun 3, 2017 ... Humans have bred dogs to look exactly the ways we want them to. We now have hundreds of breeds of dog, in all shapes and sizes.


Sep 29, 2012 ... The dogs on the left are from the 1915 book, 'Breeds of All Nations' by W.E. ..... Evolution is selective breeding as done by the environment.


Nov 5, 2016 ... A look at what selective breeding has done to the health of dogs and a brief history of selective breeding of dogs.


Jul 7, 2017 ... Selective breeding in dogs allows humans to specialize dogs to perform certain tasks and look certain ways. Impossible without selective dog ...


Mar 13, 2017 ... Astonishing photos from the last century show how selective breeding has dramatically changed the appearance of many pure bred dogs.