. The physical basis of heredity . Heredity. CROSSING OVEE AND CHEOMOSOMES 109 In the second division of this chromosome the longer thread separates from the shorter one—the second is therefore reductional. It is evident, especially from 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 Morgan, Thomas Hunt, 1866-1945. Philadelphia : Lippincott

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