Wednesday, April 14, 2010
Wednes-Day 2
Bio - we learned about "sex-linked" genes/traits that are caused by alleles located on the "X"/sex chromosomes. Males have one X and one "Y" sex chromosome and, because the Y chromosome is so much smaller than the X, the Y contains very few of the alleles that are found on the X chromosome. We saw how this could lead to the inheritance of traits ONLY IN MALES, given a NORMAL heterozygous/carrier mother and a NORMAL father.
We saw how the percentage of males and females with a recessive trait differs due to this sex linkage and the lack of a homologous allele on the Y chromosome.
We introduced the conventions for creating a pedigree chart, which we will use to show the inheritance of autosomal traits as well as sex-linked traits.
AP Chem - we discussed the "common ion effect" for sparingly soluble salts, showing the kinetic and Le Chatelier effect of adding a soluble salt that has an ion that is the SAME/COMMON TO an ion that is in solution from the sparingly soluble salt. The net effect is to DECREASE the solubility even further of the sparingly soluble salt.
We then began a more quantitative example of this effect , seeing whether a precipitate would form when two solutions form a potential double replacement with precipitation reaction.
# posted by C @ 1:39 PM 
