Analysis of synaptonemal complexes in a heterozygous human male carrier of a reciprocal translocation involving an acrocentric chromosome: heterosynapsis without previous homosynapsis

1991 ◽  
Vol 87 (5) ◽  
pp. 602-606 ◽  
Author(s):  
A. de Perdigo ◽  
O. Gabriel-Robez ◽  
Y. Rumpler
Keyword(s):  
Reciprocal Translocation ◽  
Acrocentric Chromosome ◽  
Synaptonemal Complexes ◽  
Human Male ◽  
Male Carrier

Analysis of synaptonemal complexes in two fertile heterozygous boars, both carriers of a reciprocal translocation involving an acrocentric chromosome

1989 ◽  
Vol 50 (4) ◽  
pp. 220-225 ◽  
Author(s):  
H. Jaafar ◽  
O. Gabriel-Robez ◽  
C. Ratomponirina ◽  
J. Boscher ◽  
M. Bonneau ◽  
...  
Keyword(s):  
Reciprocal Translocation ◽  
Acrocentric Chromosome ◽  
Synaptonemal Complexes

Synaptonemal complex analysis in a human male carrier of a 4;6 translocation: heterosynapsis without previous homosynapsis

1991 ◽  
Vol 86 (3) ◽  
pp. 279-282 ◽  
Author(s):  
A. de Perdigo ◽  
O. Gabriel-Robez ◽  
C. Ratoinponirina ◽  
Y. Rumpler
Keyword(s):  
Synaptonemal Complex ◽  
Complex Analysis ◽  
Human Male ◽  
Synaptonemal Complex Analysis ◽  
Male Carrier

THREE NEW CHROMOSOMAL TRANSLOCATIONS IN HAWORTHIA

1968 ◽  
Vol 10 (3) ◽  
pp. 487-494 ◽  
Author(s):  
Herbert P. Riley ◽  
S. K. Majumdar
Keyword(s):  
Reciprocal Translocation ◽  
Acrocentric Chromosome ◽  
Centric Fusion ◽  
Metacentric Chromosome ◽  
Chromosomal Translocations ◽  
Short Chromosome ◽  
Acrocentric Chromosomes ◽  
Fusion Type

In one plant of a small-leaved form of Haworthia glauca a centric fusion type of reciprocal translocation was found between two long chromosomes with subterminal centromeres that interchanged to form a long metacentric and a short acrocentric chromosome; the latter is larger than the normal short chromosomes of the complement and consists of the short arms of the two original long chromosomes. In a typical plant of the same species a similar interchange was followed or accompanied by a second interchange between the short translocation chromosomes and a normal short chromosome to form a somewhat intermediate-sized acrocentric and a very short metacentric chromosome. In a plant of H. fulva a long and a short chromosome interchanged to produce two intermediate-sized acrocentric chromosomes. Possible evolutionary implications of these interchanges are discussed.

Centromere orientation at metaphase I of a translocation heterozygote in lentil

1983 ◽  
Vol 25 (6) ◽  
pp. 547-553 ◽  
Author(s):  
Frida Buruchin ◽  
G. Ladizinsky
Keyword(s):  
Reciprocal Translocation ◽  
Acrocentric Chromosome ◽  
Similar Length ◽  
Translocation Heterozygote ◽  
Ring Bivalents ◽  
Acrocentric Chromosomes ◽  
Number Of Cells ◽  
Metaphase I

Reciprocal translocation between submetacentric and acrocentric chromosomes of lentil was studied. This interchange did not entail karyotypic changes. Two homomorphic ring bivalents produced by the four chromosomes of the translocation complex indicated that the long arm of the acrocentric chromosome was involved in the interchange. Chiasmata distribution in the native arms, the translocated and interstitial segments in bivalents and quadrivalents, was taken as an indication for two pairing pattern in the translocation complex. Chiasma terminalization in the short arm of the acrocentric chromosome of the translocation complex was faster in bivalents than in quadrivalents. The overwhelming number of cells with alternate-1 compared with alternate-2 orientation was attributed to the similar length of the zigzag diagonals of alternate-1 that apparently induced greater stability. The necessary elements for adjacent-2 orientation were available in the examined material but were practically absent. Pole–centromere specificity was proposed for explaining the absence of adjacent-2 in the present and other studies and the orientation of homologous centromeres to opposite poles even when they were located in different bivalents.

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