Genomic imprinting is the process by which gene activity is regulated according to parent of origin. Usually, this means that either the maternally inherited or the paternally inherited allele of a gene is expressed while the opposite allele is repressed. The phenomenon is largely restricted to mammals and flowering plants and was first recognized at the level of whole genomes. Nuclear transplantation experiments carried out in mice in the late 1970s established the non-equivalence of the maternal and paternal genomes in mammals, and a similar conclusion was drawn from studies of interploidy...

The story of the naval battle for control of the Upper Mississippi in the American Civil War. Employing the ill-fated bastion of Fort Pillow as its focus, The Battle of Plum Run depicts the squalid history of Union occupation in West Tennessee, as well as the hatred, bigotry and greed that culminated in the Fort Pillow Massacre. A companion volume to Andrew Ward's critically praised River Run Red, The Battle of Plum Run is rich in research, telling detail, driving narrative, and a cast of unforgettable characters.