Human Genetics And Its Social Import
Human Genetics And Its Social Import
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Since the lowest types of mental defectives are more or less pathological products, their high death rate is to be expected. Dayton finds that in Massachusetts the expectation of life of mental defectives at two years of age increases as the degree of defect decreases. For idiots it is twenty-one years for females and twenty years for males. For imbeciles it is thirty-eight for females and twenty-nine for males and for morons it is forty-six for females and fifty-two for males, whereas in the g...eneral 26o HUMAN GENETICS AND ITS SOCIAL IMPORT population of the state it is fifty-nine for females and fifty-six for males.
Evidently natural selection is tending to get rid of mental defectives. To a certain extent it is doing the same with the insane. The death rate of inmates of asylums for the insane is much higher than that of the general population of corresponding ages. Epilepsy is not infrequently associated with early death. And there are other nervous disorders in which heredity plays a large part which either shorten life or prevent marriage and the procreation of children.
What to read after Human Genetics And Its Social Import?
You can find similar books in the "Read Also" column, or choose other free books by Samuel J Samuel Jackson Holmes to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Since the lowest types of mental defectives are more or less pathological products, their high death rate is to be expected. Dayton finds that in Massachusetts the expectation of life of mental defectives at two years of age increases as the degree of defect decreases. For idiots it is twenty-one years for females and twenty years for males. For imbeciles it is thirty-eight for females and twenty-nine for males and for morons it is forty-six for females and fifty-two for males, whereas in the g...eneral 26o HUMAN GENETICS AND ITS SOCIAL IMPORT population of the state it is fifty-nine for females and fifty-six for males.
Evidently natural selection is tending to get rid of mental defectives. To a certain extent it is doing the same with the insane. The death rate of inmates of asylums for the insane is much higher than that of the general population of corresponding ages. Epilepsy is not infrequently associated with early death. And there are other nervous disorders in which heredity plays a large part which either shorten life or prevent marriage and the procreation of children.
What to read after Human Genetics And Its Social Import?
You can find similar books in the "Read Also" column, or choose other free books by Samuel J Samuel Jackson Holmes to read onlineMoreLess
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