Quantitative analysis of C bands in chromosomes 1, 9, and 16 of Brazilian Indians and Caucasoids.
Hum Genet
; 57(1): 58-63, 1981.
Article
em En
| MEDLINE
| ID: mdl-7262870
Densitometric C-band measurements in chromosomes 1, 9, and 16 of 394 Indians and 40 Caucasoids living in Brazil are reported. No significant intratribal variability in the average length of these regions was observed, and the intertribal variation showed no consistent patterns. But the Caucasoids always presented lower means. The relative C-band sizes of these three chromosomes, however, were very similar in Indians and Caucasoids. The indices of heteromorphism displayed analogous results; only in chromosome 16 are they dissimilar in these two ethnic groups. An unexpected sex difference was observed in the C-band sizes of this chromosome, females uniformly presenting higher averages than males. Centromeric heterochromatin appeared in 6% and 9% respectively of the short arms of chromosomes 1 and 9 among the Caucasoids, while among the Indians its prevalence was 2% in both chromosomes.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Indígenas Sul-Americanos
/
Bandeamento Cromossômico
/
Cromossomos Humanos 1-3
/
Cromossomos Humanos 16-18
/
Cromossomos Humanos 6-12 e X
/
População Branca
Tipo de estudo:
Risk_factors_studies
Limite:
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Hum Genet
Ano de publicação:
1981
Tipo de documento:
Article
País de publicação:
Alemanha