in the x direction, the water wants to flow in that direction) For a given hydraulic. conductivity, the vertical flow rate depends on the sum of the gravitational potential energy. gradient per unit weight of water (dz/dz =1) and the vertical gradient in soil water pressure.
Origin and spread of the 1278insTATC mutation causing TayâSachs disease in Ashkenazi Jews: Genetic drift as a robust and parsimonious hypothesis. Human Genetics 114 (4): 366â376. pmid 14727180.
Tay-Sachs is a disease that is the result of a genetic mutation; it is fatal and affects the central nervous system. It is the result of the HEXA gene, located on chromosome 15; what occurs is that children have the deficiency of the enzyme, Hex X.here are two different kinds of this; infantile tay-sachs disease and late onset of tay-sachs disease. Infantile Tay-Sachs starts to show signs when the infant is around six months old; by age two, most children with this condition have seizures and decreasing mental state.