In early embryonic development, some female cells pass through a process called lionization and one of the X chromosomes get condensed and began to be called Barr body.
What I don't understand is how the Barr body behaves during mitosis. Specifically, if a cell had condensed a paternal X chromosome, all of its children will have a paternal Barr body. But aren't the barrbodies supposed to decondense to be able to be copied during mitosis? If so, when they recondense, why isn't the choice of which chromosome will condense random?