. The Biological bulletin. Biology; Zoology; Marine biology. SEX-LINKED INHERITANCE IN ULVA BJORN FOYN Biological Station of the University of Oslo, Drobak, Norivay In an earlier report (Foyn, 1959) mention was made of two autosomal mutants, Slender (SI) and long (1), both of which spontaneously arose in cultures of Ulva mutabilis and both of which exhibit sex-controlled manifestation. Found among the young gametophytes from a crossing between the two mutants was a small dwarfed individual entirely different from the types hitherto known. The individual was isolated and proved to belong to the
. The Biological bulletin. Biology; Zoology; Marine biology. SEX-LINKED INHERITANCE IN ULVA BJORN FOYN Biological Station of the University of Oslo, Drobak, Norivay In an earlier report (Foyn, 1959) mention was made of two autosomal mutants, Slender (SI) and long (1), both of which spontaneously arose in cultures of Ulva mutabilis and both of which exhibit sex-controlled manifestation. Found among the young gametophytes from a crossing between the two mutants was a small dwarfed individual entirely different from the types hitherto known. The individual was isolated and proved to belong to the —sex. In order to determine whether it was a matter of a new hereditary type or only a phenotypical abnormality, the gametes were put to parthenogenesis. The new germ plants were all of the same kind as the mother plant, and thus probably represented a new mutant. As de- scribed earlier (Foyn, 1958) parthenogenesis in this species is normally connected with doubling of the chromosome number. The parthenogenetic plants therefore became diploid and produced (haploid) zoospores. Figure 1 shows a few stages in their development towards 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
