Archive image from page 216 of Cytology (1961). Cytology cytology00wils Year: 1961 irf fa) (b) Figure 9-2. (a) Photomicrograph of First Meiotic Anaphase Chromo- somes of Trillium erectum; (b) Drawing Illustrating the Configuration of a True Two-Side-Arm Bridge. Strands indicated in the bridge are half chro- matids. Plant irradiated at diakinesis with 25 r of X Rays. (From Wilson, G. B., Sparrow, A. H., and Pond. 1959. 'Sub-Chromatid Rearrangements in Trillium erectum. I. Origin and Nature of Configurations Induced by Ionizing Radiation,' Am. J. Botany, 46, Fig. 2, p. 310.) MODIFICATIO
Archive image from page 216 of Cytology (1961). Cytology cytology00wils Year: 1961 irf fa) (b) Figure 9-2. (a) Photomicrograph of First Meiotic Anaphase Chromo- somes of Trillium erectum; (b) Drawing Illustrating the Configuration of a True Two-Side-Arm Bridge. Strands indicated in the bridge are half chro- matids. Plant irradiated at diakinesis with 25 r of X Rays. (From Wilson, G. B., Sparrow, A. H., and Pond. 1959. 'Sub-Chromatid Rearrangements in Trillium erectum. I. Origin and Nature of Configurations Induced by Ionizing Radiation,' Am. J. Botany, 46, Fig. 2, p. 310.) MODIFICATION OF RADIATION EFFECTS The question of modifying radiation effects, especially in the direction of minimizing them. is. of course, of practical importance, and conse- quently has received considerable attention. So far. although sensitivity can be modified in both directions by a variety of conditions, there is no real understandins of the mechanism involved. In general, conditions RADIATION CYTOLOGY / 197
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