Chromosomes Of Macaca Mulatta Leukocytes

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Abstract
A leukocyte culturing technique was used for chromosome analysis on 60 randomly sampled adult monkeys of a laboratory colony in Pureto Rico. Most chromosomes of Macaca mulatta can be individually identified from karyotype analysis on the basis of their relative length, arm ratio, and presence of secondary constrictions. There is a diploid count of 42. Three general groups in the karyotype form a closely graded series of 7 long pairs, 10 medium pairs, and 4 small pairs. The autosomes include 8 metacentric pairs and 12 submetacentric pairs. The female X chromosomes are 8 in decreasing order of size, whereas the male Y chromosome is the smallest chromosome of the complement.