Sex-chromosome Mosaicism in the Lemur-like Possum Hemibelideus lemuroides (Marsupialia: Petauridae)

Abstract

A regular system of sex chromosome mosaicism in a somatic tissue is reported in H. lemuroides. Spermatogonial mitosis and cultured fibroblast cells are 2n = 20, while most bone marrow cells from both males and females are 2n = 19. In males the Y chromosome is lost and in females one of the X chromosomes.