. Contributions from the Laboratory of Plant Genetics. Studies of Teratological Phenomena. 115 crosses with 402, the Aa and Bb classes were always easily dis- tinguished. In the dihybrid cross under discussion then, an F2 ratio of 1 AABB : 2 AABb : 2 AaBB : 4 AaBb : 1 AAbb : 2 Aabb : 1 aaBB : 2 aaBb :. 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 Bussey Institution. Boston : [s. n. ]

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