Banding Patterns of the Chromosomes of A teles geoffroyi with Description of Two Cases of Pericentric Inversion

1975 ◽  
Vol 4 (2) ◽  
pp. 108-113 ◽  
Author(s):  
M. García ◽  
M.R. Caballin ◽  
J. Aragonés ◽  
C. Goday ◽  
J. Egozcue
Keyword(s):  
Pericentric Inversion ◽  
Banding Patterns

scholarly journals Pericentric Inversion Events in Karyotypic Distinction of Brazilian Lizards of Genus Pliyllopezus (Squamata, Gekkonidae) Detected by Chromosomal Banding Patterns

Hereditas ◽  
2004 ◽  
Vol 127 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Katia Cristina Machado Pellegrino ◽  
Sanae Kasahara ◽  
Miguel Trefaut Rodrigues ◽  
Yatiyo Yonenaga-Yassuda
Keyword(s):  
Pericentric Inversion ◽  
Banding Patterns ◽  
Chromosomal Banding

Banding Patterns of the Chromosomes of Cebus apella: Unstable Chromosomes and Pericentric Inversion

1978 ◽  
Vol 29 (3) ◽  
pp. 196-205 ◽  
Author(s):  
M. García ◽  
R. Miró ◽  
L. Freitas ◽  
J. Egozcue
Keyword(s):  
Pericentric Inversion ◽  
Cebus Apella ◽  
Banding Patterns

Chromosome polymorphism in Holochilus venezuelae (Rodentia: Cricetidae): C- and G-bands

Genome ◽  
1991 ◽  
Vol 34 (1) ◽  
pp. 13-18 ◽  
Author(s):  
N. Sangines ◽  
M. Aguilera
Keyword(s):  
Pericentric Inversion ◽  
Chromosomal Polymorphism ◽  
Centric Fusion ◽  
Centromeric Heterochromatin ◽  
Fusion Product ◽  
Chromosome Polymorphism ◽  
Banding Patterns ◽  
Submetacentric Chromosome ◽  
Group A ◽  
Fusion Type

Karyological analysis of C- and G-banding patterns of 44 specimens of Holochilus venezuelae revealed six distinct karyomorphs, which were designated as follows: I (2n = 44; fundamental number (FN) = 56); II (2n = 45; FN = 58); IV (2n = 43; FN = 56);V(2n = 44; FN = 58); IV-a(2n = 42; FN = 56); and V-a (2n = 44; FN = 58). This chromosomal polymorphism is interpreted as the result of (i) one or two Robertsonian changes of the centric-fusion type, originating from one member of chromosome pair 10 and one of pair 11 (in karyotypes IV and V) and two metacentric chromosomes from pairs 10 and 11 (in karyotype IV-a); (ii) one pericentric inversion (in karyotype V-a) forming one submetacentric chromosome from the metacentric fusion product described above; and (iii) the presence of B chromosomes, which are almost completely heterochromatic and do not pair with any member of group A. The pattern of C-banding reveals that the first five pairs of metacentric chromosomes contain very little centromeric heterochromatin, while pair 6 and the fusion chromosomes (10/11 F) present a thick band. Extensive homology was found between G-banding patterns of Holochilus brasiliensis from Brazil and H. venezuelae. These facts support the hypothesis of a karyotypic evolution via centric fusions previously proposed for this genus.Key words: accessory chromosome, C- and G-banding, polymorphism, Holochilus venezuelae.

scholarly journals Chromosomal differentiation between the jackrabbits Lepus insularism y Lepus californicus from Baja California Sur, México.

1999 ◽  
Vol 4 (1) ◽  
pp. 40
Author(s):  
Fernando A. Cervantes ◽  
Alejandro Rojas Viloria ◽  
Consuelo Lorenzo ◽  
Sergio Ticul Álvarez Castañeda
Keyword(s):  
Pericentric Inversion ◽  
Baja California ◽  
Constitutive Heterochromatin ◽  
Baja California Sur ◽  
Chromosome Variation ◽  
Banding Patterns ◽  
Interspecific Differences ◽  
Telocentric Chromosomes ◽  
Chromosomal Differentiation ◽  
Lepus Californicus

Resumen: Se estudiaron y compararon los cromosomas de dos especies de liebres de México. Los números diploides y fundamentales de L. insularis fueron 48 y 80, respectivamente, mientras que los de L. californicus fueron 48 and 82. Los autosomas de L. insularis fueron cuatro pares de metacéntricos, cuatro pares de submetacéntricos, nueve pares de subtelocéntricos y seis pares de telocéntricos. En contraste, L. californicus tuvo siete pares de metacéntricos, cuatro pares de submetacéntricos, siete pares de subtelocéntricos y cinco pares de telocéntricos. El cromosoma sexual X de L. insularis fue submetacéntrico de tamaño medio y el cromosoma sexual Y fue telocéntrico y pequeño. Los dos cromosomas sexuales de L.californicus fueron submetacéntricos y medianos. Se identificaron una inversión pericéntrica y dos delecciones en los cromosomas de L. californicus, las cuales explican las diferencias entre los patrones de bandas G de ambas especies. Sus diferencias en heterocromatina constitutiva fueron pocas. Estas diferencias cromosómicas pudieron haber aparecido en una población ancestral aislada de L. californicus durante el Pleistoceno y derivaron en el cariotipo actual de L. insularis. Los resultados complementan conclusiones de estudios morfológicos y morfométricos.Abstract: We evaluated and compared the chromosomes of two species of Mexican jackrabbits. The 2n and FN of L. insularis were 48 and 80, respectively, whereas those of L. californicus were 48 and 82. The autosome morphology of L. insularis is four pairs of metacentric chromosomes, four pairs of submetacentric chromosomes, nine pairs of subtelocentric chromosomes and six pairs of telocentric chromosomes. In contrast, L. californicus had seven pairs of metacentric chromosomes, four pairs of submetacentric chromosomes, seven pairs of subtelocentric chromosomes, and five pairs of telocentric chromosomes. The X chromosome of L. insularis was medium-sized and submetacentric; the Y chromosome was small and telocentric, whereas both sex chromosomes of L. californicus were medium-sized and submetacentric. A pericentric inversion and two deletions in chromosomes of L. californicus were identified which explain the differences between the G-banding patterns of the two species of jackrabbits. There were few interspecific differences within the amount of constitutive heterochromatin. The chromosome variation may have arisen in the isolated ancestor of L. californicus, and produced the karyotype of the extant L. insularis during the Pleistocene. These results complement conclusions from morphological and morphometric comparisons.Key words: Chromosomes, G- bands, C- bands, jackrabbits, Lepus insularis, Lepus californicus, Baja California, México. 

Advances in imaging SIMS studies of stained and BrdU-labelled human metaphase chromosomes

1995 ◽  
Vol 53 ◽  
pp. 932-933
Author(s):  
R. Levi-Setti ◽  
J. M. Chabala ◽  
R. Espinosa ◽  
M. M. Le Beau
Keyword(s):  
High Performance ◽  
Secondary Ion Mass Spectrometry ◽  
Analytical Sensitivity ◽  
Metaphase Chromosomes ◽  
Banding Patterns ◽  
Sector Mass Spectrometer ◽  
Staining Methods ◽  
The University ◽  
Secondary Ion ◽  
Better Than

We have shown previously that isotope-labelled nucleotides in human metaphase chromosomes can be detected and mapped by imaging secondary ion mass spectrometry (SIMS), using the University of Chicago high resolution scanning ion microprobe (UC SIM). These early studies, conducted with BrdU- and 14C-thymidine-labelled chromosomes via detection of the Br and 28CN- (14C14N-> labelcarrying signals, provided some evidence for the condensation of the label into banding patterns along the chromatids (SIMS bands) reminiscent of the well known Q- and G-bands obtained by conventional staining methods for optical microscopy. The potential of this technique has been greatly enhanced by the recent upgrade of the UC SIM, now coupled to a high performance magnetic sector mass spectrometer in lieu of the previous RF quadrupole mass filter. The high transmission of the new spectrometer improves the SIMS analytical sensitivity of the microprobe better than a hundredfold, overcoming most of the previous imaging limitations resulting from low count statistics.

The staining pattern of the tropomyosin sequence is displayed in a new paracrystal

1986 ◽  
Vol 44 ◽  
pp. 150-151
Author(s):  
M.K. Lamvik ◽  
L.L. Klatt
Keyword(s):  
Amino Acid ◽  
Amino Acid Sequence ◽  
Staining Pattern ◽  
Banding Patterns ◽  
Mass Thickness ◽  
New Form

Tropomyosin paracrystals have been used extensively as test specimens and magnification standards due to their clear periodic banding patterns. The paracrystal type discovered by Ohtsuki1 has been of particular interest as a test of unstained specimens because of alternating bands that differ by 50% in mass thickness. While producing specimens of this type, we came across a new paracrystal form. Since this new form displays aligned tropomyosin molecules without the overlaps that are characteristic of the Ohtsuki-type paracrystal, it presents a staining pattern that corresponds to the amino acid sequence of the molecule.

scholarly journals Diversity of Common Bean Landraces Collected in the Western and Eastern Carpatien

2011 ◽  
Vol 39 (No. 3) ◽  
pp. 73-83 ◽  
Author(s):  
O. Horňáková ◽  
M. Závodná ◽  
M. Žáková ◽  
J. Kraic ◽  
F. Debre
Keyword(s):  
Cluster Analysis ◽  
Common Bean ◽  
Morphological Characters ◽  
Molecular Data ◽  
Seed Traits ◽  
Phaseolus Vulgaris L ◽  
Growth Type ◽  
Banding Patterns ◽  
Polymorphism Detection ◽  
Thousand Seed Weight

The study of diversity in common bean was based on morphological and agronomical characteristics, differentiation of collected accessions by morphological and molecular markers, detection of genetic variation, and duplicates detection in bean landraces. The analysed 82 accessions of common bean (Phaseolus vulgaris L.) were collected in the Western andEastern Carpatien as landrace mixtures. Their seeds were segregated and pooled according to their characteristics; they were further multiplicated, and introduced into the collection. An extensive variation in plant and seed traits was discovered in thirty-three morphological and agronomical characteristics. Nevertheless, some of the accessions were identical in these characteristics. Cluster analysis grouped genotypes into two main branches, reflecting the growth type, seed size parameters, and thousand-seed weight. Molecular differentiation studies were performed by multilocus polymorphism detection in microsatellite and minisatellite DNA regions. Cluster analysis based on molecular data also grouped genotypes but no linkage to morphological traits was revealed. Bean accessions with very similar or identical morphological characters were clearly distinguished by DNA banding patterns. The presence of duplicates was excluded.  

scholarly journals Fertility problems in males carrying an inversion of chromosome 10

Open Medicine ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 316-321
Author(s):  
Xinyue Zhang ◽  
Qingyang Shi ◽  
Yanhong Liu ◽  
Yuting Jiang ◽  
Xiao Yang ◽  
...  
Keyword(s):  
Spontaneous Abortion ◽  
Pericentric Inversion ◽  
Paracentric Inversion ◽  
Chromosome 10 ◽  
Partial Duplication ◽  
Recurrent Miscarriages ◽  
First Case ◽  
Fertility Problems ◽  
Male Carriers ◽  
Male Carrier

Abstract Chromosomal inversion is closely related to male infertility. Inversion carriers may produce abnormal gametes, which may lead to partial duplication/deletion of the embryonic chromosome and result in spontaneous abortion, a fetus with multiple anomalies, or birth of a malformed child. Genetic counselling remains challenging for these carriers in clinical practice. We report two male carriers with inversion of chromosome 10 and review 26 reported cases. In the first case, 46,XX,inv(10)(p13q22) of the fetal chromosome was found in prenatal diagnosis; this was inherited from the paternal side with 46XY,inv(10)(p13q22). Another case was a male carrier with inv(10)(q21.2q22.1). There have been 25 (89.3%) cases of pericentric inversion and three (10.7%) cases of paracentric inversion involving chromosome 10. Of 28 cases, nine were associated with pregestational infertility of the couples, while the other 19 cases were associated with gestational infertility of the couples or normozoospermia. The breakpoints at 10p15, 10p11, 10q11, and 10q21 were associated with pregestational infertility of the couples. The breakpoints at 10p15, 10p14, 10p13, 10p12, 10p11, 10q11, 10q21, 10q22, 10q23, 10q24, 10q25, and 10q26 were related to gestational infertility of the couples or normozoospermia. Although there is a high risk of infertility or recurrent miscarriages, carriers with inversion of chromosome 10 might produce healthy offspring. Natural pregnancy can be used as a choice for inversion carriers with recurrent spontaneous abortion.

Trisomy 21 for the region 21q223: Identification by high-resolution R-banding patterns

1981 ◽  
Vol 56 (3) ◽  
pp. 409-411 ◽  
Author(s):  
J. F. Mattei ◽  
M. G. Mattei ◽  
M. A. Baeteman ◽  
F. Giraud
Keyword(s):  
High Resolution ◽  
Trisomy 21 ◽  
Banding Patterns
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