. Cell heredity. Cytogenetics. GENETIC CONTROL OF CELL INTEGRATION 343. FIGURE Photographs of corn kernels demonstrating the effect of dosage of Ac upon the time of occurrence of Ds-induced chromosomal breaks. (o) and (b). One Ac is present and the breaks at Ds occur early in development giving rise to large sectors. (c). The pattern produced v/hen two doses of Ac are present indicates the late time of occurrence of Ds breaks. (d). When three doses of Ac are present, the Ds-induced breaks occur so late that only a few colored specks can be seen. In all plants used in these crosses, the
. Cell heredity. Cytogenetics. GENETIC CONTROL OF CELL INTEGRATION 343. FIGURE Photographs of corn kernels demonstrating the effect of dosage of Ac upon the time of occurrence of Ds-induced chromosomal breaks. (o) and (b). One Ac is present and the breaks at Ds occur early in development giving rise to large sectors. (c). The pattern produced v/hen two doses of Ac are present indicates the late time of occurrence of Ds breaks. (d). When three doses of Ac are present, the Ds-induced breaks occur so late that only a few colored specks can be seen. In all plants used in these crosses, the genotype of the female parent was C bz/C bz and the male was / Bz Ds with Ds located between 62 and the centromere. / is a dominant inhibitor of pigmentation, allelic to C (from McCiintock, 1951, C. S. H. Symp. Quanf. Biol., 16:13).. 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 Sager, Ruth; Ryan, Francis J. (Francis Joseph), 1916-. New York, Wiley
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