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They actually didn't care and it was normal at the time. Peasants may have inbred. Furthermore, only certain nobility were inbred. In Spain there were laws to protect the old Christian population from outbreeding. Obviously as the "pure" population declines core time things get worse and this is an expected result. Furthermore, even today scholars ...


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Genetics was discovered in the 19th and 20th centuries. Half of an organism's genes come from its male parent and half from its female parent. Various genes can be good or bad for someone's health. If a gene is dominant, it will be expressed and effective if someone gets it only one parent. If a gene is recessive, it will be expressed and effective if ...


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