Physiological genetics

Abstract

Allot riploid hybrids, 149 Allium fistulosum, 280 Amphibia, merogony, 44 ovocytes, 264 species hybrids, 180 Anemone, 200 Anthocyanin, 169-170 Antimorphs, 135 Antirrhinum, A. majus, 98 geographic species, 273 radium-induced abnormalities, 25 Aquilegia vulgaris, 38, 279 Argynnis, paphia, 130 paphia-valesina, 250 Arrhenius's formula, 44 Artemia salina, 153

Transposons and genome evolution in plants

“…Several prominent geneticists, among them Correns and Goldschmidt, dismissed unstable mutations as a special category of ''diseased genes'' (10,11). It was their view that little could be learned from the study of such mutations that was relevant to the study of conventional genes.…”

Cell Genetics and Hereditary Symbiosis

“…Current opinion emphasizes the continuous functioning of the energic nucleus (38,73,143,190) rather than an intermittent outpouring at karyokinesis or karyolysis. The chromidia have a counterpart in gene-initiated but autonomous plasmagenes, postulated as one mechanism of nuclear control (45,219,220), but this theory has not been substantiated to the exclusion of nuclear regulation (rather than origination) of preexisting plasmids.…”

“…Cytological studies have taken some exceptions to the genetic uniformity of somatic cells of the differentiated organism, but have not thereby contributed affirmatively to a comprehensive theory of development (83,121,220). Although the pertinence of extranuclear heredity for ontogeny has been generally accepted, in the absence of extensive evidence for it, plausible theories of development have been constructed which rely on the ultimate primacy of the nucleus (73,131,193,202,220). For technical reasons, cell genetics is best studied in organisms whose germ and soma are not irreversibly differentiated, especially in the microorganisms where vegetative proliferation is preeminent.…”

Studies in Biochemical Genetics in Drosophila

“…The smaller size of the adult structure in both vestigial wings and Bar eyes has been attributed to a lytic action (20)(21)(22); the small size of the vestigial wing is explained by Waddington (23) as due to abnormalities in the folding of the wing bud; and Steinberg (24) states that the small size of the Bar eye is due (a) to a smaller amount of material being available for the formation of an eye and (b) to variations in the fate of cells of the eye disc which may form either the ommatidia of the eye or head chitin. For both vestigial and Bar there are alternate explanations: the small size is due to the destruction or cytolysis of part of a normal sized embryological rudiment, or the small size is due to the fact that the embryological rudiment itself is smaller than normal.…”