. Bulletin of the Philosophical Society. Philosophical Society (University of Virginia). Scientific Section; Science; Philosophy. STUDIES IN HUMAN HEREDITY 307 The fraternities of charts, figures 24, 28, 30, and 35, are sufficiently close to expectation to suggest a DR X DR cross. O-T-D n. ^i^ Fig. 33. Fig. 34. Chart, figure 34, moreover again indicates that ambidexterity may perhaps be specifically hereditary. In family history 35, "one grand- child out of each family is ; "^ 0-H5i i Fig. 35. In fifty-three instances, among the total of one himdred, neither parent i
. Bulletin of the Philosophical Society. Philosophical Society (University of Virginia). Scientific Section; Science; Philosophy. STUDIES IN HUMAN HEREDITY 307 The fraternities of charts, figures 24, 28, 30, and 35, are sufficiently close to expectation to suggest a DR X DR cross. O-T-D n. ^i^ Fig. 33. Fig. 34. Chart, figure 34, moreover again indicates that ambidexterity may perhaps be specifically hereditary. In family history 35, "one grand- child out of each family is ; "^ 0-H5i i Fig. 35. In fifty-three instances, among the total of one himdred, neither parent is left-handed; these include fifteen instances where in addition neither grandparent is left-handed; and ten where one or other grandparent is left-handed. In thirty-eight instances no information is given concerning grandparents; these include ten instances where either an imcle or aunt is left-handed. The cases of total absence of left-handedness in the pedigree (for two previous generations) of a left-handed individual are therefore very rare, if indeed, they exist at all. Actual cases must be interpreted as spontane- ous variations, which are probably just as liable to occur now as Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Philosophical Society (University of Virginia). Scientific Section; University of Virginia. Charlottesville, Va. : University of Virginia
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