. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. Fig. 73.—Twin hybrids; a, Oenothera laeta, and 6, Oenothera velutina. (After de Vries.) to make the race in question breed constant though heterozygous. When O. biennis, 0. syrticola, or certain other species are fertiUzed by Lamarckiana or by certain of its "mutants" (, nanella, rubrinervis, or ob- longa), the first generation hybrids are of two 'dis- tinct types, called by de Vries "Iseta" and "; (Fig. 73.) This phenomenon was shown by de Vries to be due to a peculiarity of

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. The Mechanism of Mendelian heredity. Mendel's law; Heredity; Chromosomes. Fig. 73.—Twin hybrids; a, Oenothera laeta, and 6, Oenothera velutina. (After de Vries.) to make the race in question breed constant though heterozygous. When O. biennis, 0. syrticola, or certain other species are fertiUzed by Lamarckiana or by certain of its "mutants" (, nanella, rubrinervis, or ob- longa), the first generation hybrids are of two 'dis- tinct types, called by de Vries "Iseta" and "; (Fig. 73.) This phenomenon was shown by de Vries to be due to a peculiarity of Lamarckiana 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