The frequency of an inherited change over generations. – Explain the statement.
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Frequency of certain genes in a population change over several generations resulting in evolution. The factors affecting change in genetic frequency are natural selection, genetic drift, mutations and gene flow. Weight loss or gain occurs due to external factors such as food and is not genetically controlled. Hence, low weight parents can have heavy weight progeny due to difference in food habit. Frequency of inherited traits change over generation and causes evolution whereas traits that are not inherited over generations like dancing, playing guitar do not cause evolution.
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