scholarly journals The origin of unusual chromosome constitutions among newly formed allopolyploids

2014 ◽  
Vol 101 (2) ◽  
pp. 318-326 ◽  
Author(s):  
Sylwia Oleszczuk ◽  
Adam J. Lukaszewski
Keyword(s):  
Unusual Chromosome

DNA hypomethylation and unusual chromosome instability in cell lines fromICF syndrome patients

2000 ◽  
Vol 89 (1-2) ◽  
pp. 121-128 ◽  
Author(s):  
C.M. Tuck-Muller ◽  
A. Narayan ◽  
F. Tsien ◽  
D.F.C.M. Smeets ◽  
J. Sawyer ◽  
...  
Keyword(s):  
Cell Lines ◽  
Chromosome Instability ◽  
Dna Hypomethylation ◽  
Unusual Chromosome

scholarly journals The effect of an unusual chromosome architecture on disjunction and non-disjunction in Drosophila

1983 ◽  
Vol 41 (1) ◽  
pp. 17-28 ◽  
Author(s):  
Raphael Falk
Keyword(s):  
Sex Chromosomes ◽  
Sex Chromosome ◽  
Chromosome Architecture ◽  
Preferential Segregation ◽  
Males And Females ◽  
Unusual Chromosome ◽  
Chromosome Disjunction

SUMMARYTwo homologous autosomes of Drosophila that were attached to form a single entire compound autosome II were found to affect the segregation of the sex chromosomes in both males and females. The compound segregated nearly always from an attached X . Y chromosome in males with no other sex chromosome. When two sex chromosomes were present together with the compound they differed in their tendency to segregate from the compound. In males the X . Y chromosome segregated more often from the compound than did the Y chromosome, and the Y chromosome segregated more often from the compound than did the regular X chromosome. In females the X . Y segregated more often from the compound than did the regular X chromosome. This preferential segregation in females was observed for exchange X chromosomes as well as for the non-exchange chromosomes.In the presence of the compound the frequency of primary non-disjunction of the sex chromosomes was elevated in both females and males; usually both sex chromosomes segregated from the compound and only rarely with it.Flies devoid of most of the proximal heterochromatin of the sex chromosomes die. However, when the compound autosome was present some such flies survived. This indicates that a segment of the proximal heterochromatin of the sex chromosomes was intercalated into the compound when it was constructed. It was concluded that the segment intercalated into the compound carries specific sites for sex chromosome disjunction. Specific sites determine sex chromosome disjunction in males. In females they determine the disjunction of the sex chromosomes in cooperation with exchange pairing.

Case of Chronic Lymphocytic Leukemia with Unusual Chromosome Aberrations

2004 ◽  
Vol 80 (4) ◽  
pp. 351-353 ◽  
Author(s):  
Hui-Hua Hsiao ◽  
Yi-Hui Hung ◽  
Hui-Pin Hsiao ◽  
Shih-Bin Tseng ◽  
Hui-Jen Tsai ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Chromosome Aberrations ◽  
Lymphocytic Leukemia ◽  
Unusual Chromosome

An unusual chromosome 22q11 deletion associated with an apparent complementary ring chromosome in a phenotypically normal woman

2011 ◽  
Vol 54 (3) ◽  
pp. 292-294 ◽  
Author(s):  
Jérôme Toutain ◽  
Laurence Taine ◽  
Fanny Morice-Picard ◽  
Houria Hallal ◽  
Zong-Qi Dai ◽  
...  
Keyword(s):  
Ring Chromosome ◽  
22Q11 Deletion ◽  
Normal Woman ◽  
Chromosome 22Q11 ◽  
Unusual Chromosome

Leukemic evolution in three patients with myelodysplastic syndrome and unusual chromosome changes

1992 ◽  
Vol 61 (2) ◽  
pp. 162-164 ◽  
Author(s):  
Giandomenico Palka ◽  
Giuseppe Calabrese ◽  
Liborio Stuppia ◽  
Paolo Guanciali Franchi ◽  
Adriano Antonucci ◽  
...  
Keyword(s):  
Myelodysplastic Syndrome ◽  
Unusual Chromosome

Unusual chromosome 20 anomaly arising ?de novo? to give dic(20)qs

1989 ◽  
Vol 84 (1) ◽  
pp. 97-98 ◽  
Author(s):  
Dolores Pimentel ◽  
Pilar Alonso ◽  
J.A. Abrisqueta
Keyword(s):  
De Novo ◽  
Chromosome 20 ◽  
Unusual Chromosome

Circumscription of three annual species of Paspalum Plicatula Group (Poaceae: Paspaleae) in the light of morphological and chromosomic data

Phytotaxa ◽  
2021 ◽  
Vol 491 (4) ◽  
pp. 257-270
Author(s):  
MAYCO WERLLEN-SANTOS ◽  
SUELI MARIA GOMES ◽  
DANIELA CRISTINA ZAPPI ◽  
REGINA CÉLIA DE OLIVEIRA
Keyword(s):  
Chromosome Number ◽  
Species Complex ◽  
Conservation Status ◽  
Annual Species ◽  
Comprehensive Review ◽  
Evolutionary Pattern ◽  
Distribution Maps ◽  
Unusual Chromosome ◽  
Morphological Differences ◽  
Published Research

Paspalum comprises 350 species worldwide and is the largest genus of Poaceae in Brazil (211 species). The reticulated evolutionary pattern within the informal Paspalum Plicatula Group makes it a challenging species complex to treat taxonomically. The present work aims to study the three annual species P. cordaense, P. macranthecium and P. plowmanii, characterized by spikelet morphology and anthecium appearance, supported by a comprehensive review of herbaria and fieldwork collections of all related species. When ascertaining the identity of P. cordaense, we realized that it is distinct from P. plowmanii, while these two species are closely related to P. macranthecium. These findings are supported by morphological differences and by the first report of unusual chromosome number for P. plowmanii 2n = 38, whereas the numbers in P. cordaense are 2n = 40 and in P. macranthecium 2n = 20, from previously published research. We clarify the circumscription of the three species and provide a key, descriptions, comments, illustrations, distribution maps and conservation status for all species. The lectotypification of P. cordaense is also proposed.

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