In most mammals, females have two X chromosomes and males have one X and one Y chromosome in each of their cells. To avoid a double dose of X-linked genes in females, one of the Xs is silenced early ...

Older female mice show poor spatial memory when their paternal X chromosome is inactive and only the maternal copy is active. This phenomenon could be responsible for variation in age-related ...

Cancer cells acquire genetic changes that allow them to grow and proliferate unchecked. Researchers at the Dana-Faber Cancer Institute and colleagues have now found another difference between cancer ...