New ways to look at X inactivation.
D000818:Animals; D004622:Embryo, Mammalian / Q000648:ultrastructure; D005260:Female; D005865:Gestational Age; D008297:Male; D051379:Mice; D011247:Pregnancy; D014176:Protein Biosynthesis; D012730:Sex Chromosomes / Q000502:physiology*; D014960:X Chromosome / Q000502:physiology*