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Pedigree analysis is a useful tool in genetics to study the inheritance of traits across generations, but it has several limitations that reduce its accuracy and reliability. One major limitation is the small size of most human families, which provides limited data and makes it difficult to draw statistically significant conclusions. Unlike controlled breeding experiments in plants or animals, human pedigrees depend on ___ _____ _________ _______ ________ __________ ____ _____.
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