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 Disease. Tay Sachs is a recessive genetic disease caused by a mutation in the hexosaminidase A gene, HEXA. A mutation in the gene causes fat molecules to accumulate in the brain.ay Sachs Disease. Tay Sachs is a recessive genetic disease caused by a mutation in the hexosaminidase A gene, HEXA. A mutation in the gene causes fat molecules to accumulate in the brain.