Results 41 to 50 of about 453 (159)

Heterochromatin differentiation in holocentric chromosomes of Rhynchospora (Cyperaceae)

open access: yesGenetics and Molecular Biology, 2000
Holocentric chromosomes of six species of Rhynchospora, R. ciliata, R. pubera, R. riparia and R. barbata (2n = 10), R. nervosa (2n = 30) and R. globosa (2n = 36), were stained with CMA3/DAPI fluorochromes or treated with C-banding and sequentially ...
André L.L. Vanzela, Marcelo Guerra
doaj   +1 more source

Evaluation of the mutagenic effect of the iodinated contrast medium Urografina® 292 using the micronucleus test in mouse bone marrow cells

open access: yesAnais da Academia Brasileira de Ciências, 2013
Contrast media (CM) are frequently used in diagnostic radiology and in radiotherapy as a diagnostic tool and in treatment planning. Previous studies have demonstrated that these compounds induce chromosomal aberrations. This study evaluates the mutagenic
MÔNICA B.B. BELLE   +3 more
doaj  

Cytogenetics of the neotropical flesh fly Pattonela intermutans (Diptera, Sarcophagidae)

open access: yesGenetics and Molecular Biology, 2000
Pattonella intermutans has 2n = 12 chromosomes including three metacentric and two submetacentric pairs of autosomes and an XX/XY sex chromosome pair.
Patricia Pasquali Parise-Maltempi   +1 more
doaj   +1 more source

A new karyotype for the genus Cavia from a southern island of Brazil (Rodentia - Caviidae)

open access: yesGenetics and Molecular Biology, 1998
Intraspecific karyotype variation in mammal species is very common and often caused by centromeric fusion of acrocentric chromosomes. We describe here a new karyotype 2n = 62 (FN = 112) for the genus Cavia from the Moleques do Sul Islands, of the ...
A. Gava, T.R.O. Freitas, J. Olimpio
doaj   +1 more source

A posição do gen Y3 no cromossomo 2 do milho [PDF]

open access: yesAnais da Escola Superior de Agricultura Luiz de Queiroz, 1953
This paper deals with the genetic relations among y3 - lg1 - gl2. The data obtained indicate the relative order in chromosome 2 as follows: y3 7 gl1 18 gl2.
openaire   +3 more sources

Microphotometrical image analysis of the subtelomeric region of T-banded endoreduplicated chromosomes of Chinese hamster ovary cells

open access: yesGenetics and Molecular Biology, 1998
Microphotometrical scanning and computer graphic image analysis were carried out to detect the distribution of chromatin densities in subtelomeric segments of T-banded endoreduplicated chromosomes of Chinese hamster ovary (CHO) cells.
Máximo E. Drets, Marcos Mendizábal
doaj   +1 more source

CROMOSSOMOS, SEGREDOS E MISTÉRIOS: METODOLOGIA ALTERNATIVA NO ENSINO DE CITOGENÉTICA

open access: yesRevista Extensão & Cidadania, 2021
Este relato de experiência docente demonstra o potencial da aprendizagem baseada em projeto (ABProj) no ensino-aprendizagem de Citogenética, disciplina optativa nos cursos de bacharelado e licenciatura em Ciências Biológicas da UESB. O Seminário intitulado: “Cromossomos: Segredos e Mistérios” permitiu a divulgação dos princípios citogenéticos e da ...
openaire   +4 more sources

Interindividual size heteromorphism of NOR and chromosomal location of 5S rRNA genes in Iheringichthys labrosus

open access: yesBrazilian Archives of Biology and Technology, 2007
Twenty-five specimens of Iheringichthys labrosus from the Capivara Reservoir were analysed cytogenetically. AgNORs were detected in a pair of ST chromosomes, in the telomeric region of the long arm.
Rafael Augusto de Carvalho   +1 more
doaj   +1 more source

R- and G-band patterns in Astyanax scabripinnis paranae (Pisces, Characiformes, Characidae)

open access: yesGenetics and Molecular Biology, 1999
The absence of longitudinal bands in fish chromosomes has been associated with technical problems in chromosome preparations or the absence of a structural compartmentalization in the fish genome.
Edson Luis Maistro   +2 more
doaj   +1 more source

Multiple copy number variation in a patient with Kleefstra syndrome. [PDF]

open access: yesRev Paul Pediatr, 2023
Lee TN   +6 more
europepmc   +1 more source

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