A Mammalian X-O Sex-Chromosome System in the Monotreme Tachyglossus aculeatus Determined from Leucocyte Cultures and Testicular Preparations
- 1 January 1967
- journal article
- research article
- Published by University of Chicago Press in The American Naturalist
- Vol. 101 (917) , 79-86
- https://doi.org/10.1086/282472
Abstract
Thexhromosomal complement of the Echidna is 64 in the female and 63 in the male which is the heterogametic sex. This indicates an XX female, XO male sex-chromosome mechanism. The position of the monotreme karyotype relative to those in birds, reptiles and mammals is discussed. Mitotic yields for varied conditions of culture of peripheral leucocytes and for the hypotonic treatment of testis material are given.This publication has 5 references indexed in Scilit:
- The Chromosomes of Necturus maculosus as Revealed in Cultures of LeukocytesThe American Naturalist, 1964
- Close karyological kinship between the reptilian suborder serpentes and the class avesChromosoma, 1964
- Chromosomal uniformity in the avian subclass CarinataeChromosoma, 1964
- Chromosome preparations of leukocytes cultured from human peripheral bloodExperimental Cell Research, 1960
- Are There No Mammal Species with Xo Males-And If Not, Why Not?The American Naturalist, 1960