1999
DOI: 10.1038/sj.ejhg.5200274
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Cytogenetic analysis of sperm chromosomes and sperm nuclei in a male heterozygous for a reciprocal translocation t(5;7)(q21;q32) by in situ hybridisation

Abstract: We have studied the meiotic segregation of a reciprocal translocation t(5;7)(q21;q32) in a male carrier, using the human sperm-hamster oocyte fusion technique and the whole chromosome painting. A total of 296 sperm complements were analysed by dual chromosome painting. The frequencies of alternate, adjacent-1, adjacent-2 and 3:1 segregation were 49.7%, 32.4%, 16.2% and 1.7% respectively. Aneuploidy frequencies for chromosomes not involved in the translocation were determined by FISH on decondensed sperm heads … Show more

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Cited by 36 publications
(22 citation statements)
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“…Dual-colour FISH with centromeric probes enabled the authors to differentiate between alternate and adjacent-1 segregation because one of the breakpoints had a centromeric position. In our study, as in other published data (Cifuentes et al 1999;Van Hummelen et al 1997;Estop et al 1998;Blanco et al 1998Martini et al 1998Geneix et al 2002), a three-colour FISH analysis using a locusspecific probe for the translocated fragment and centromeric probes has enabled the detection of all types of segregations. The differentiation of adjacent-1 and alternate segregation was also possible because the interstitial segment at meiosis 1 is short, reducing considerably the probability of an interstitial chiasma (Armstrong and Hulten 1998).…”
Section: Discussionsupporting
confidence: 61%
“…Dual-colour FISH with centromeric probes enabled the authors to differentiate between alternate and adjacent-1 segregation because one of the breakpoints had a centromeric position. In our study, as in other published data (Cifuentes et al 1999;Van Hummelen et al 1997;Estop et al 1998;Blanco et al 1998Martini et al 1998Geneix et al 2002), a three-colour FISH analysis using a locusspecific probe for the translocated fragment and centromeric probes has enabled the detection of all types of segregations. The differentiation of adjacent-1 and alternate segregation was also possible because the interstitial segment at meiosis 1 is short, reducing considerably the probability of an interstitial chiasma (Armstrong and Hulten 1998).…”
Section: Discussionsupporting
confidence: 61%
“…It has been proposed that distortions in adjacent 1 and 2 proportions can be caused by the presence of unfinished recombinations in MI (Van Hummelen et al, 1997). However, results obtained in other studies do not agree with this explanation (Cifuentes et al, 1999a;Honda et al, 1999). In relation to the 3:1 segregation, in general there is an excess of monosomic spermatozoa compared to the complementary trisomic spermatozoa.…”
Section: Comparison Of Results Obtained By Both Methodscontrasting
confidence: 52%
“…There are different individual translocation heterozygotes with the same translocated chromosomes which show different segregation frequencies. This is the case, for example, of two individuals who are carriers of a t(5;7) (Estop et al, 1995;Cifuentes et al, 1999a). It is possible that, in this case, the frequency of the recombination phenomena can be altered due to the position of the breakpoints, so that the cause of the differences in the segregation pattern is the presence or absence of chromosomal exchanges.…”
Section: Comparison Of Results Obtained By Both Methodsmentioning
confidence: 99%
“…This approach has been used successfully on many occasions in Man to study the segregation products of various chromosomal rearrangements [1,4,5,7,20,21,40]. In livestock species, the spermFISH technique was formerly used to quantify X-and Y-bearing sperm in cattle [17,28,31,36] and pigs [23], as well as for the estimation of aneuploidy rates in pigs [34].…”
Section: Introductionmentioning
confidence: 99%