. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. TYPES OF MENDELIAN HEREDITY 29 the heterozygous condition; it is not possible to produce a pure breeding race of Andalusians, for the combination that produced an Andalusian falls apart in the germ cells of the Andalusian birds. The bird is blue because the pigment is not spread evenly over the feather but is restricted to small but black Fig. 16.—Normal (a, a') and bar eye (6, b') of Drosophila; shown in side view, and as seen from above. The Andalusian blue is a mosaic of black and white, and not at aU a dil
. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. TYPES OF MENDELIAN HEREDITY 29 the heterozygous condition; it is not possible to produce a pure breeding race of Andalusians, for the combination that produced an Andalusian falls apart in the germ cells of the Andalusian birds. The bird is blue because the pigment is not spread evenly over the feather but is restricted to small but black Fig. 16.—Normal (a, a') and bar eye (6, b') of Drosophila; shown in side view, and as seen from above. The Andalusian blue is a mosaic of black and white, and not at aU a dilute black. A good example of an intermediate hybrid is found when the mutant fly with bar eye (Fig. 15) is bred to a wild fly. The daughters have bar eyes that are not as narrow as those of the pure bar stock. The range of variation is great, however, for some of the hybrids have eyes that are nearly as round as the normal, and. 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 Morgan, Thomas Hunt, 1866-1945. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1920, bookpublishernewyo, bookyear1922
