Human X-chromosome inactivation pattern distributions fit a model of genetically influenced choice better than models of completely random choice
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چکیده
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Inactivation of the maternal or paternal X chromosome in a mammalian embryonic XX cell is believed to involve random choice between the two X's. We propose two alternative models. One suggests that choice is not random, while the other is consistent with random choice, but not one between two X's.
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X chromosome inactivation (XCI) reduces the number of actively transcribed X chromosomes to one per diploid set of autosomes, allowing for dosage equality between the sexes. In eutherians, the inactive X chromosome in XX females is randomly selected. The mechanisms for determining both how many X chromosomes are present and which to inactivate are unknown. To understand these mechanisms, resear...
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In female mammals, one of two X chromosomes is epigenetically inactivated for gene dosage compensation, known as X inactivation (Xi). Inactivation occurs randomly in either the paternal or maternal X chromosome in all embryonic cell lineages, designated as random Xi. By contrast, in extra-embryonic cell lineages, which are segregated from somatic cell lineages in pre-implantation development, t...
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ژورنال
عنوان ژورنال: European Journal of Human Genetics
سال: 2013
ISSN: 1018-4813,1476-5438
DOI: 10.1038/ejhg.2013.84