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birth order 163 SOURCES OF SIBLING COMPETITION On average, siblings with the same parents share half their genes. As a consequence, most siblings are twice as related to themselves as they are to one
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Document Date: 2010-10-06 19:54:39
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birth order 163 SOURCES OF SIBLING COMPETITION On average, siblings with the same parents share half their genes. As a consequence, most siblings are twice as related to themselves as they are to one