Chromosome banding pattern homologies and NORs for the Bactrian camel, guanaco and llama.
The bactrian camel, guanaco and llama were all shown to have a diploid chromosome number of 74 and a karyotype consisting of 3 pairs of submetacentric and 33 pairs of acrocentric autosomes, a large submetacentric X and a very small acrocentric Y. There were no differences in either G- or C-band patterns among these 3 species. The small arms of acrocentric chromosomes were C-band positive, and interstitial C-bands were associated with the centromere of the submetacentric chromosomes. The camel had 5 pairs of nucleolar organising chromosomes, and the guanaco and llama exhibited 6. The identical patterns in chromosome linear differentiation for these Camelidae suggests that their karyotype has been highly stable for millions of years.