The products of some natural and human selection are all around us. People have transformed the wild crop profits from selective breeding. Selected Food pets and other domestic animals of very different sizes and shapes of their wild ancestors. Controlled genetic crosses can be used to identify and locate genes that may be applicable to artificial selection in domesticated species. Genetic crosses in maize and dog show, for example, that relatively few geneticThe changes are needed to radically change the shape and structure of plants and animals. can generate natural selection in wild populations as well as surprising diversity in a surprisingly short time. Ocean sticklebacks, for example, colonized rivers and freshwater lakes by several glaciers after the last ice age produced. differential survival and reproduction under natural selection have generated profound changes in morphology, physiology and behavior of fishadapted to different food sources, predators, and water conditions. How does the nature of converting a marine ancestors in various forms of water? Again, genetic studies suggest that major evolutionary changes are controlled by major genes. Further studies of these genes is a molecular picture of how plants and animals through artificial selection and natural have been converted. www.hhmi.org http
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