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Robert Bakewell was a very successful breeder of commercial livestock in the 18th century.

His work was based on the traditional method of visual appraisal of the animals that he selected.

For example, let Epistatic variation is caused by the joint effects of genes at two or more loci.

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Purebred associations provide other services that are useful to their members to enhance their businesses.environment.

Genetic gains made using additive genetic effects are permanent and cumulate from one generation to the next.

Although dominance variation is not more complex in theory, it is more difficult to control in practice because of how one allele masks the effect of another.

Although he did not write about his methods, it is recorded that he traveled extensively by horseback and collected sheep and cattle that he considered useful.

It is thought that he made wide outcrosses of diverse breeds, and then practiced inbreeding with the intent of fixing desirable characteristics in the crossbred animals.

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