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.
As mentioned above, Tay-Sachs is inherited in an autosomal recessive pattern. Only homozygotes for the mutant allele display the phenotype of Tay-Sachs. For a Tay-Sachs child to be born, both parents have to be carriers of the mutant allele. If this is the case, there is a 25% chance that this couple will have an affected child. However, two