Genomic imprinting: The phenomenon of parent-of-origin gene expression. The expression of a gene depends upon the parent who passed on the gene.For instance, two different disorders-Prader-Willi syndrome and Angelman syndrome -- are due to deletion of the same part of chromosome 15.enomic imprinting: The phenomenon of parent-of-origin gene expression. The expression of a gene depends upon the parent who passed on the gene.
Todayâs lesson is brought to you by 7, 14, and the letters. Kw, pH. Kw: the ion-product constant of water Q: will pure distilled water conduct electricity A: As the demo shows, it will (slightly). If water conducts electricity, ions must exist Water exists as an equilibrium, which is referred to as the self-ionization of water: H2O + H2O ï« H3O+(aq) + OHâ(aq) Kw What is the value of Kw?
H = H products-H reactants. At constant pressure, when a reaction gives off heat to its surroundings, the enthalpy of the system decreases. Because the sum of the enthalpies of the products is smaller than the sum of the enthalpies of the reactants, exothermic reactions are characterized by negative values of H.he change in the enthalpy of the system as the reactants are converted into the products of the reaction is therefore known as the enthalpy of reaction. The relationships between heat, the internal energy of the system, and the enthalpy of the system during a chemical reaction can be summarized as follows.