. Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement. Breeding; Domestic animals; Plants, Cultivated. Fig. 22. A hand- shaped corncob showing a tendency to branching of the ear, not at all un- common causes to become hereditary. Fusingof parts. Ouite the oppo- site of doubling is the fusing or joining of two parts into one. Thus the tw<^ kidneys may be joined at one end, making the horseshoe kidne}-. A pair of horns may be compounded into one. Two fingers of the human hand or the two t
. Domesticated animals and plants; a brief treatise upon the origin and development of domesticated races, with special reference to the methods of improvement. Breeding; Domestic animals; Plants, Cultivated. Fig. 22. A hand- shaped corncob showing a tendency to branching of the ear, not at all un- common causes to become hereditary. Fusingof parts. Ouite the oppo- site of doubling is the fusing or joining of two parts into one. Thus the tw<^ kidneys may be joined at one end, making the horseshoe kidne}-. A pair of horns may be compounded into one. Two fingers of the human hand or the two toes of the pig ^ may be united into one. When unit characters get mis- placed. Perhaps the most remarkable fact of development and differentia- tion is seen when a normal struc- ture develops in an abnormal place. Thus occasionally a tooth will develop roebuck are united into a single ^1 f r .1 ii T ,1 beam for a considerable distance, m the roof of the mouth, as if the ^^^ ^f^envards they germ of it had in some wa^â got After Uatcson misplaced but was able to grow in its new place, like a tree that is transplanted. Sometimes the eye of an insect will develop not as an eye but as an antenna. 1 These are the so-called solid- or mule-hoofed hogs. This abnormality- arises frequently and may be readily propagated, as it happens to be fairly hereditary. See " Principles of Breeding," pp. 55, 23. Compounding of paired organs: the two horns of this. 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 Davenport, E. (Eugene), 1856-1941. Boston, New York, Ginn and company
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Keywords: ., bookauthordavenpor, bookcentury1900, bookdecade1910, bookyear1910
