Abstract
Two reciprocal balanced translocations 46,XY,t(9;13)(p23;q21) and 46,XX,t(13;21)(q21;q21), identified by RFA-and GTG-banding, are presented along with a complete study of both families. In the second case a 3 : 1 segregation is associated with an unbalanced 2 : 2 segregation, as demonstrated in the two surviving sons: one with interchange trisomy 21 and the other with partial trisomy 13 and partial monosomy 21. This suggests that the presence of this translocation, and possibly of other translocations involving morphologically similar chromosomes, could signify a high risk of having chromosomal disorders in offspring.
MeSH Terms
Abnormalities, Multiple/genetics
Adult
Chromosome Banding
Chromosomes, Human, 13-15/ultrastructure
Chromosomes, Human, 21-22 and Y/ultrastructure
Chromosomes, Human, 6-12 and X/ultrastructure
Dermatoglyphics
Female
Humans
Infant, Newborn
Karyotyping
Male
Pedigree
Phenotype
Translocation, Genetic
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Prieto F
Badia L
Asensi F
Roques V
References (15)
15 references, click to expand
-
Familial C-G translocation causing mitotic nondisjunction. A cause of familial mosaic Down's syndrome.
Am J Dis Child. 1968 Dec;116(6):609-14
PMID: 4235163
-
Familial translocation t(3p-;21q+) associated with both Down's and Sturge-Weber's syndrome in unbalanced state.
Humangenetik. 1975 Sep 23;29(3):207-16
PMID: 126210
-
Rare translocation 47,XY,t(12;21) in Down's syndrome.
Hum Hered. 1974;24(2):160-6
PMID: 4278407
-
Reciprocal translocations in man. 3:1 Meiotic disjunction resulting in 47- or 45-chromosome offspring.
J Med Genet. 1975 Mar;12(1):29-43
PMID: 123589
-
A new case of trisomy for the distal part of 13q due to maternal translocation, t(9;13)(p21;q21).
Hum Genet. 1976 Aug 30;33(3):213-22
PMID: 964983
-
Chromosome preparations of leukocytes cultured from human peripheral blood.
Exp Cell Res. 1960 Sep;20:613-6
PMID: 13772379
-
Further delineation of the clinical picture of trisomy for the distal segment of chromosome 13: report of three cases.
Hum Genet. 1976 Apr 15;32(1):1-12
PMID: 1262020
-
Identification of a C6-G21 translocation chromosome by the Q-M and Giemsa banding techniques in a patient with Down's syndrome, with possible assignment of Gm locus.
Clin Genet. 1973;4(1):53-7
PMID: 4120631
-
[X-chromosome translocations. Examination based on treatment with BUDR and staining with acridine orange].
Helv Paediatr Acta. 1974;Suppl 34:19-31
PMID: 4141698
-
Identification of a familial 19-21 translocation by Q and G band patterns.
Humangenetik. 1973 May 25;18(3):219-24
PMID: 4719633
-
Identification of human chromosomes by DNA-binding fluorescent agents.
Chromosoma. 1970;30(2):215-27
PMID: 4193398
-
Letter: Mongolism by tertiary trisomy.
Lancet. 1975 Mar 22;1(7908):698-9
PMID: 47133
-
Systematic analysis of 95 reciprocal translocations of autosomes.
Hum Genet. 1978 Dec 29;45(3):259-82
PMID: 738728
-
[t(7q-; 21q-plus) and familial and trisomy 21].
Ann Genet. 1974 Mar;17(1):49-53
PMID: 4276449
-
A rapid banding technique for human chromosomes.
Lancet. 1971 Oct 30;2(7731):971-2
PMID: 4107917