. The elements of genetics. Genetics. THE CYTOPLASM by sorting out will inevitably enjoy a selective advantage during development. Alternatively we may say that the mutation is due, as with kappa, to a reduced concentration in a plasmagene that is Tl. Fig. 44.—The origin and persistence of a defective capacity for development in Phascolus vulgaris after treatment with chloral hydrate. P, parent; PT, treated parent; T 1-6, derived generations (after Hotfmami, 1927). normally present, its regular concentration being recovered, as Somieborn has suggested, when sexual reproduction affords a respit
. The elements of genetics. Genetics. THE CYTOPLASM by sorting out will inevitably enjoy a selective advantage during development. Alternatively we may say that the mutation is due, as with kappa, to a reduced concentration in a plasmagene that is Tl. Fig. 44.—The origin and persistence of a defective capacity for development in Phascolus vulgaris after treatment with chloral hydrate. P, parent; PT, treated parent; T 1-6, derived generations (after Hotfmami, 1927). normally present, its regular concentration being recovered, as Somieborn has suggested, when sexual reproduction affords a respite to growth. Severe external shocks may have an effect, similar to the dauer- modification of plasmagenes, on self-propagating substances released into the cytoplasm by nuclear genes. Goldschmidt has found in Drosophila that it is possible in this way to imitate the effects of gene change by treatment of the pupae, producing what he has described 184. 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 Darlington, C. D. (Cyril Dean), 1903-; Mather, Kenneth. New York : Macmillan
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Keywords: ., bookcentury1900, bookpublishernewyorkmacmil, booksubjectgenetics
