Our preliminary studies have revealed nanometer - scale fine features within heterochromatic foci for the first time. (ellisonfoundation.org)
To see if this lack of heterochromatic marks and Xist, both of which normally block gene expression on the inactive X, resulted in increased gene expression, the researchers looked at immunity - related genes on the X chromosome to see if there was one or two copies being expressed. (sciencedaily.com)
Australian Shepherds carry the gene for heterochromatic eyes, in other words, they are often multicolored. (wileypup.com)