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On the evolution of sex determination
Female mice reject skin grafts from intrastrain males because of the H-Y transplantation antigen. Those females produce antibodies that recognize a male-specific cell-surface antigen in serologicalExpand
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Xenopus laevis Daudin
The pair of large acrocentric autosomes bears a secondary constriction and satellites on the short arm.
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X-autosome ratio and the behavior pattern of individual X-chromosomes in placental mammals
SummaryFrom the 15 diverse species of placental mammals investigated cytologically in this laboratory, seven species and one interspecific hybrid were selected for the present study : man (HomoExpand
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Cytotaxonomy and chromosomal evolution in Serpentes.
The karyotypes of 15 species of snakes are described: Lachesis muta noctivaga , Micrurus lemniscatus carvalhoi , Philodryas aestivus aestivus , &l
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Polyploidy and mechanisms of karyotypic diversification in Amphibia.
Polyploid species were described in amphibians of the family Ceratophrydidae (Procoela). Tetraploid (4N = 44) and octoploid (8N = 104) karyotypes resulted apparently by duplication of ancestral genome
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Close karyological kinship between the reptilian suborder serpentes and the class aves
SummaryIn contrast to the situation found in two classes of warm-blooded vertebrates, mammals and birds, the class Reptilia is not uniform with regard to total genetic content; rather, it containsExpand
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Cytological evidence of constant tetraploidy in the bisexual South American frog Odontophrynus americanus
Odontophrynus americanus has 2n=44 chromosomes in somatic and gonad cells which can be ordered in 11 groups of homologues. In spermatocytes I they form mostly ring quadrivalents. In metaphase II 22Expand
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Chromosome Polymorphism, Geographical Variation and Karyotypes in Sauria
SUMMARYA comparative cytogenetic study was done on ten lacertilian species belonging to six families: Iguanidae, Teiidae, Amphisbaenidae, Gekkonidae, Anguidae and Scincidae.Intra-individual andExpand
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Nucleolar organizer regions and constitutive heterochromatin in polyploid species of the genus Odontophrynus (Amphibia, Anura).
Chromosome banding patterns obtained by ammoniacal silver staining (Ag-AS) and alkaline Giemsa (CBG) have been analysed in several amphibian species of the genus Odontophrynus from South America.Expand
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Bovine papillomavirus transmission and chromosomal aberrations: an experimental model.
Enzootic haematuria and urinary bladder cancer in cattle are associated with feeding on bracken fern and bovine papillomavirus (BPV) infection. An increased rate of chromosomal aberrations inExpand
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