For selective breeding to be successful,a desired trait must:

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For selective breeding to be successful, a desired trait must be heritable, meaning that the trait is passed down through the genes from one generation to the next. This allows for the trait to be selectively bred for over many generations, leading to a population with a high frequency of that desired trait. Traits that are not heritable will not be passed down to offspring, and thus will not be able to be selectively bred for. While it would be ideal if the desired trait was entirely under genetic control and not affected by the environment, these factors are not absolute requirements for selective breeding to be successful. Additionally, it is not necessary for the trait to occur in all offspring, as long as it has a relatively high frequency in the population being selectively bred.

For Selective Breeding to Be Successful,a Desired Trait Must