. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. Fig. 16.—a, Long wing (wild type) of Drosophila; 6, miniature wing, (o and 6 are not drawn to scale.) ajiondition-as-coniplete dominance^ Some cases ap- proach so nearly to that condition that special tests may be required to show that the hybrid is affected by the recessive factor. For instance, in flies the factor for white eyes seems to produce no effect when white is bred to red. The Fi reds are indis- tinguishable from pure reds. But by weakening the red by adding recessive factors other than white, the influence

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. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. Fig. 16.—a, Long wing (wild type) of Drosophila; 6, miniature wing, (o and 6 are not drawn to scale.) ajiondition-as-coniplete dominance^ Some cases ap- proach so nearly to that condition that special tests may be required to show that the hybrid is affected by the recessive factor. For instance, in flies the factor for white eyes seems to produce no effect when white is bred to red. The Fi reds are indis- tinguishable from pure reds. But by weakening the red by adding recessive factors other than white, the influence of white can be demonstrated, as Mor-. 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