Frequency and character of the distribution of acrocentric chromosome associations are determined in 40 phenotypically healthy native inhabitants of the Latvian SSR (20 males and 20 females). The ability to associations is the lowest for chromosomes 15 and 22 and the highest for chromosomes 21, 14 and 13. It is found that a tendency to associations between chromosomes 21-21 (P less than 0.05) and 13-21 (P less than 0.01) is not of an accidental character.

Adolescent↗

PubMedDate not supplied

[Balanced translocation t (3; 21) (q 11; q 21) as a cause of habitual abortions].

Explore the source record for details and available documents.

Abortion, Habitual↗

PubMedDate not supplied

[Cytogenetic study of married couples with recurrent spontaneous abortions].

A cytogenetic study was carried out in the chromosome set for 202 couples with recurrent spontaneous abortions of unknown genesis. Anomalies in the chromosome set were observed in 2.5% of cases.

Abortion, Spontaneous↗

PubMedDate not supplied

[Polymorphism of the chromosome Q-segments in phenotypically healthy persons of the native population of the Latvian SSR].

Chromosomes of 140 healthy adult individuals from the Latvian population were investigated by the fluorescence method. Data on the polymorphism patterns are presented for chromosomes 3, 4, 13, 14, 15, 21, 22 and Y. No differences were revealed between sexes in the frequency of highly fluorescent segments of autosomes. The frequencies of homozygotes and heterozygotes for certain chromosome segments did not correspond to the Hardy-Weinberg distribution.

Adolescent↗

PubMedDate not supplied

[Quantitative analysis of the polymorphism of the C-bands of chromosomes 1, 9, 16 and Y in Latvians].

A quantitative analysis of the C-band polymorphism in chromosomes 1, 9, 16 and Y was made in 50 phenotypically normal individuals (25 males and 25 females). At an average level of the chromosome spiralization (the mean chromosome size is 2-7 micrometers) mean C-band lengths of chromosomes 1, 9, 16 and Y obtained in the course of the study are 1.09, 0.94, 0.82 and 0.80 micrometers, respectively. A comparative analysis of the mean C-band lengths in chromosomes 1, 9, 16 in the male and female groups has revealed no sex differences. The highest variability of the C-band size is found for chromosome 1 and the lowest--for chromosomes 16 and Y.

Adolescent↗

PubMedDate not supplied

[Chromosome study in primary amenorrhea].

Primary amenorrhea was studied in 64 women. Chromosome abnormalities or karyotype-phenotype non-conformity were found in 31 of 64 patients (48.4%). The following types of chromosomal pathology were found out: 7 cases with 45,X constitution; 3--45,X/46,XX; 1--45,X/46,XY; 1--45,X/46. XYq-; 1--46,XXq-; 1--45,X/46,XXq-; 2--46,X,i(qX); 2--45,x/46,X,i(qX); 1--45,X/46,XX, +mar. In 12 cases phenotypic women had a 46,XY karyotype.

Adolescent↗