Tuesday, April 13, 2010

 

Tues-Day 1

Bio - we showed the two other types of dominance: CODOMINANCE (BOTH alleles are expressed COmpletely and INDEPENDENTLY) and INCOMPLETE dominance (a BLEND) in which a new INTERMEDIATE/blend of the two alleles is expressed e.g. red x white = pink.
We predicted the phenotypes for the F1 and F2 generations for each of these types of dominance.

We then discussed MULTIPLE ALLELES and showed that four or more phenotypes for a given trait suggests THREE or more alleles that cause these phenotypes. The most common example of multiple alleles is the A,B, and O alleles that determine the FOUR blood types.
We showed how possible parent genotypes could cause or exclude certain blood (pheno)types in their children.

We finished up the menstrual cycle and meiosis/reproduction labs and then began our current unit lab on inheritance and pedigree charts.

AP Chem - we did problems in which we went forwards and backwards between solubility to molar solubility to concentrations of aqueous ions at equilibrium to the Ksp. We discussed the "master chart" showing the relationship between solution (forming) stoichiometry, molar solubility "s", the concentrations of the aqueous ions at equilibrium, and the calculation of "s" from Ksp and vice-versa.
Today's after school test is posted on Blackboard. There will be another one on Wednesday.

# posted by C @ 1:07 PM


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