X-inactivation in marsupials and monotremes

Marsupials (metatherian) and eutherians (‘placental’) are the two extant groups of live bearing mammals which constitute the Theria, as opposed to the Protheria, or egg-laying monotremes. The current estimates for times of separation are 145 MYR BP for Th

Author D. W. Cooper, P. G. Johnston, J. M. Watson and J. A. M. Graves
Year 1993
Secondary title Semin. Developmental Biology
Volume 4
Number 2
Pages 117-128