RHYTHM AND NATURAL SELECTION.
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Biological Phenomena↗
Biomedical subjects
R C BAUMILLER
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Phenotypic effects of heterozygous, x-rayinduced mutations in Drosophila.
Heterozygous mutations produced by 3000 r delay pupation in about 9 percent of larvae of Drosophila melanogaster under nutritional stress and kill approximately 6 percent. The effects are less, though appreciable, when there is excess nutrient; no effects are detectable after oögonia are irradiated. Irradiated sperm and oöcytes cause detriment, partly via different types of mutations, in approximately equal amounts.
Animals↗