SciHawks

AP Chem - we reviewed the thermochemistry part of the thermodynamics unit, and did two last subtopics: Hess Law diagrams of the so-called "Born-Haber" cycle, in which you relate a multi-step pathway involving ionization energies, electron affinities, heats of sublimation/vaporization/fusion, and bond dissociation energies to an overall one-step formation reaction. In any of these problems, there are usually 7 or 8 known quantities and just one unknown quantity that you solve for.
In another subtopic, we found an individual bond enthalpy based on the bond enthalpies of all of the other bonds in the reactants and products as well as the overall enthalpy change of the reaction. Again, in these problems, all but one quantity is known. Also, to avoid errors, simply add up the bond enthalpies with the appropriate realistic sign, + for bond breakage, - for bond formation.

Bio - we looked at alleles on the X sex chromosome that are not found on the shorter homologous Y sex chromosome in males; this leads to sex-linked traits that show up in different percentages between male and female offspring.
We then discussed the conventions used in pedigree charts, and deduced the possible genotypes of the individuals in the chart based on the phenotypes of the parents and offspring of several generations.