[Familial reciprocal translocations: estimation of the most probable imbalance in the offspring].
Four familial reciprocal translocations detected in a chromosomic study made to a population of newborn babies with two or more congenital defects following the methodology of ECEMC is analyzed. We followed the criteria of pachytene-dyagrem model of Jalbert et al (1980) to predict the most probable mode of imbalance for reciprocal translocations is followed. On the four translocations it was observed the type of segregation which was most probable following that model: three of them produced imbalance by a 3:1 segregation and the other one be adjacent 1. According to these results and regarding that a given translocation produces imbalances almost always by the same mechanism, we can provide a useful information for genetic counselling for these families.
Díaz de Bustamante Zulueta
A
A
Estudio colaborativo español de malformaciones congénitas (ECEMC), Facultad de Medicina, Universidad Complutense, Madrid.
Mori Alvarez
M A
MA
Pinel de la Cruz
I
I
Urioste Azcorra
M
M
Martínez Frias
M L
ML
D005838:Genotype; D006801:Humans; D010641:Phenotype; D011379:Prognosis; D012306:Risk; D014178:Translocation, Genetic
Translocaciones recíprocas familiares: estimación del desbalance más probable en la descendencia.