According to Klug et al.'s eighth edition of Essentials of Genetics, heritability is defined as 'the proportion of total phenotypic variation in a population that is due to genetic factors', as opposed to the proportion of phenotypic variation, for instance, height, that is 'due to [one's] genes'. I do not fully understand what the difference is between the two, and would appreciate it if someone were to give an explanation with an analogy (for instance, if height had a heritability estimate of 50%, then if we understood heritability as the former, then we could deduce so and so, but if we used the latter definition, we would say so and so).
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