The Chromosomes and Systematic Position of the Marsupial Mole, Notoryctes typhlops

Abstract

A cytological study showed that the diploid chromosome number in N. typhlops is 2n = 20. All autosomes are submetacentric and three pairs are somewhat larger than the remainder. The male is the heterogametic sex, and the unpaired chromosomes are a submetacentric one (X) about the same size as the smaller autosomes, and a small acrocentric one (Y).