Tuesday, March 31, 2009
Tues-Day 1
AP Chem- took the most challenging test of the year: a combo buffer/titration/salt equilibria exam. The number of steps required to get the answer and the level of rational thought involved on this test is unparalleled compared to any other test. Only the Bonding/Intermolecular Forces test involves as much knowledge of chemistry.
Bio 6/7- we illustrated how to draw out a pedigree chart; pedigree charts are useful for tracking and/or inferring the genotypes that exist in members of a family tree. The charts are also used to predict the probability that a given offspring will inherit a given trait from her/his parents based on the parents' and grandparents' phenotypes. Be careful, some of these charts show the genotype of the family members but others merely show the phenotypes from which the genotypes must be inferred. It may take some trial and error to deduce/infer the genotypes of the family tree members!
We noted that it is easier/more logical to start from the part of the chart that has the RECESSIVE allele expressed in the phenotype, i.e. begin anywhere in the chart that shows the homozygous recessive genotype.
We continued the human trait pedigree lab and finished up any questions on the prior two labs.
Bio 8- we illustrated how to draw out a pedigree chart; pedigree charts are useful for tracking and/or inferring the genotypes that exist in members of a family tree. The charts are also used to predict the probability that a given offspring will inherit a given trait from her/his parents based on the parents' and grandparents' phenotypes. Be careful, some of these charts show the genotype of the family members but others merely show the phenotypes from which the genotypes must be inferred. It may take some trial and error to deduce/infer the genotypes of the family tree members!
We noted that it is easier/more logical to start from the part of the chart that has the RECESSIVE allele expressed in the phenotype, i.e. begin anywhere in the chart that shows the homozygous recessive genotype.
Bio 6/7- we illustrated how to draw out a pedigree chart; pedigree charts are useful for tracking and/or inferring the genotypes that exist in members of a family tree. The charts are also used to predict the probability that a given offspring will inherit a given trait from her/his parents based on the parents' and grandparents' phenotypes. Be careful, some of these charts show the genotype of the family members but others merely show the phenotypes from which the genotypes must be inferred. It may take some trial and error to deduce/infer the genotypes of the family tree members!
We noted that it is easier/more logical to start from the part of the chart that has the RECESSIVE allele expressed in the phenotype, i.e. begin anywhere in the chart that shows the homozygous recessive genotype.
We continued the human trait pedigree lab and finished up any questions on the prior two labs.
Bio 8- we illustrated how to draw out a pedigree chart; pedigree charts are useful for tracking and/or inferring the genotypes that exist in members of a family tree. The charts are also used to predict the probability that a given offspring will inherit a given trait from her/his parents based on the parents' and grandparents' phenotypes. Be careful, some of these charts show the genotype of the family members but others merely show the phenotypes from which the genotypes must be inferred. It may take some trial and error to deduce/infer the genotypes of the family tree members!
We noted that it is easier/more logical to start from the part of the chart that has the RECESSIVE allele expressed in the phenotype, i.e. begin anywhere in the chart that shows the homozygous recessive genotype.
# posted by C @ 2:08 PM 
