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Hereditary Characters
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Excerpt from Hereditary Characters: And Their Modes of Transmission
During recent years an enormous advance has been made in the knowledge of cell-phenomena. As cells are the ultimate units of all living matter, the significance of their phenomena in connection with a study of the problems of heredity is obvious. Such information is, however, scattered in a number of scientific journals, and it is difficult for the general biologist to keep up to date. In the present volume I have attempted to apply recent discoveries, as well as experimental work upon cells, to some problems in heredity, and I believe that I have thus arrived at a satisfactory harmonising of the results of the Mendelian experiments with the observations of the Biometricians. This has been done by showing that some parts of the cells involved in fertilisation - that is, in the production of a new individual - are distributed in an alternative manner, while other parts simply divide in bulk. Correns has suggested that the characters that are inherited according to the Mendelian law are not specific. In 1907 I suggested that there were two classes of characters, which behaved in different manners with regard to inheritance, but I believe that a complete theory, dividing characters into individual and racial, and attributing to each a different mode of transmission, is put forward here for the first time.
To this theory I suggest as a corollary, a fresh hypothesis regarding the problem of sex.
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