- obsolete inactivation of paternal X chromosome
OBSOLETE. Compensating for the two-fold variation in X-chromosome:autosome ratios between sexes by a global inactivation of all, or most of, the genes specifically on the paternal X-chromosome in the XX sex.
- random inactivation of X chromosome
Compensating for the two-fold variation in X-chromosome:autosome ratios between sexes by a global inactivation of all, or most of, the genes on either the paternal or maternal X-chromosome in the XX sex.
- dosage compensation by inactivation of X chromosome
Compensating for the two-fold variation in X-chromosome:autosome ratios between sexes by heterochromatin formation leading to a global inactivation of all, or most of, the genes on one of the X-chromosomes in the XX sex.
- obsolete inactivation of X chromosome by DNA methylation
OBSOLETE. Compensating for the two-fold variation in X-chromosome:autosome ratios between sexes by a global inactivation of all, or most of, the genes on one of the X-chromosomes in the XX sex by a mechanism of DNA methylation.
- dosage compensation by hypoactivation of X chromosome
Compensating for the two-fold variation in X:autosome chromosome ratios between sexes by an inactivation of a proportion of genes on both of the X chromosomes of the XX sex, leading to a decrease, of half, of the levels of gene expression from these chromosomes. An example of this process is found in Caenorhabditis elegans.