| 单词 | brachydactyly |
| 例句 | One of the cases which has been most fully worked out is that of a deformity known as brachydactyly. Mendelism Third Edition One of the best attested single characters in human heredity is brachydactyly, "short-fingerness," which results in a reduction in the length of the fingers by the dropping out of one joint. Applied Eugenics Similarly, brachydactyly in man may be due to the loss of an inhibiting factor which prevents it appearing in normal persons. Hormones and Heredity The factor for brachydactyly evidently produces its primary effect on the bones of the hand, but it also produces a secondary effect on all the bones of the body. Applied Eugenics It has been found that an abnormality quite like brachydactyly is produced by abnormality in the pituitary gland. Applied Eugenics In medical literature, however, there are numerous records of the spontaneous origin of various abnormalities which behave as dominants, such as brachydactyly, and Bateson considers the authenticity of some of these to be beyond doubt. Hormones and Heredity It is then fair to suppose that the factor which produces brachydactyly does so by affecting the pituitary gland in some way. Applied Eugenics |
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