Abstract:
: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.
journal_name
Hum Genetjournal_title
Human geneticsauthors
Erdtmann B,Salzano FM,Mattevi MS,Flores RZdoi
10.1007/BF00271168subject
Has Abstractpub_date
1981-01-01 00:00:00pages
58-63issue
1eissn
0340-6717issn
1432-1203journal_volume
57pub_type
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