The meiotic chromosomes of the male dog (Canis familiaris).
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Biomedical subjects
Publications and source records attributed to I Gustavsson.
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Glucose-6-phosphate dehydrogenase specific to the erythrocytes of each of two wild hares found in Europe was discerned by starch-gel electrophoresis at pH 7.0 and pH 8.6. The single, sharp band of the dehydrogenase of Lepus europaeus was faster than that of L. timidus, at both pH levels. The sex-linkage of this enzyme was tested through reciprocal hybrids between the two species. Each male hybrid had a single band of enzyme identical with that of its mother, while both parental types of this enzyme coexisted in female hybrids. Thus, sex-linkage of glucose-6-phosphate dehydrogenase has been suggested not only in man and in the family Equidae, but now in the family Leporidae of placental mammals as well.
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The purpose of the present communication is to draw attention to the great applicability of a recently introduced R-banding technique for definite identification of cattle chromosomes in routine analysis. Banding patterns as well as densitometric measurements of normal bull chromosomes and the so-called 1/29 translocation are demonstrated.
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Genetic variation at the porcine submaxillary gland mucin (MUC) locus was revealed by RFLP analysis. A three-allele system was defined, and codominant inheritance was confirmed using a three-generation pedigree comprising 10 founder individuals, 26 F1 animals, and 200 F2 offspring. Linkage analysis was performed against a set of 56 genetic markers. The mucin locus was assigned to a previously reported linkage group comprising the markers interferon gamma (IFNG), diacylglycerol kinase (DAGK), and an anonymous microsatellite (S0092). Furthermore, the genes for mucin and interferon gamma were physically localized to porcine chromosome 5q2.3 and 5p1.2-q1.1 by fluorescence and radioactive in situ hybridization, respectively, thereby assigning four new markers to chromosome 5. This chromosome shares homologies with chromosome 5 in cattle and chromosome 12 in humans.
Embryos from vixens at different stages of gestation were measured and photographed. Implantation was observed 16-18 days after breeding. Differentiation and the development of characteristic features were described and embryonic loss was studied in relation to number of corpora lutea.