Thursday, March 26, 2009
Thurs-Day 2
Note: I'm making up Thursday morning's extra help with a Friday morning (03/27) extra help session from 8:15 to 9 AM in Room 308. See you there.
AP Chem- began our Thermo unit by reviewing the main Laws of the Universe: the 0th and 1st Laws of Thermodynamics i.e. thermal energy always flows (net) from higher temperature matter to lower temperature matter and that energy can neither be created nor destroyed, respectively.
We then discussed the mathematical and physical meaning of entropy and its units of measurement, Joules per K; molar entropy is in Joules per mole-K.
We reasoned entropy changes for various processes such as melting, freezing, sublimation, etc.
The Ksp/Salt Solubility/Buffer-Titration exam will be given next Tuesday.
Bio 6- we discussed the two possible crosses between an organism that shows the DOMINANT phenotype (either the TT genotype or the Tt genotype will cause the dominant phenotype of tallness in pea plants) and an organism that shows the RECESSIVE phenotype (which MUST be the tt genotype, only).By analyzing the percentage of offspring with the dominant or the recessive phenotype, we could infer/conclude the GENOTYPES of the parents even though we cannot physically see the genes because they are at the molecular size level.We then saw that not all genes come in just the dominant and recessive forms.There are two distinct types of INTERMEDIATE DOMINANCE:1. CODOMINANCE: occurs when BOTH alleles are expressed fully and SEPARATELY (NO BLENDING!) phenotypically. The notation used is a capital letter for the trait with a SUPERSCRIPT of the actual allele type; for example, a roan horse has both red AND white hairs, so the alleles are written CR and CW.2. INCOMPLETE DOMINANCE: occurs when BOTH alleles BLEND together to form a SINGLE intermediate trait. The notation is just a capital letter of each allele type; for example, a RED carnation (RR) crossed with a WHITE carnation (WW) will form PINK carnation (RW) offspring because both traits are expressed and blended together (NOT SEPARATE AS IN CODOMINANCE).
Bio 7/8-we discussed the two possible crosses between an organism that shows the DOMINANT phenotype (either the TT genotype or the Tt genotype will cause the dominant phenotype of tallness in pea plants) and an organism that shows the RECESSIVE phenotype (which MUST be the tt genotype, only).By analyzing the percentage of offspring with the dominant or the recessive phenotype, we could infer/conclude the GENOTYPES of the parents even though we cannot physically see the genes because they are at the molecular size level.We then saw that not all genes come in just the dominant and recessive forms.There are two distinct types of INTERMEDIATE DOMINANCE:1. CODOMINANCE: occurs when BOTH alleles are expressed fully and SEPARATELY (NO BLENDING!) phenotypically. The notation used is a capital letter for the trait with a SUPERSCRIPT of the actual allele type; for example, a roan horse has both red AND white hairs, so the alleles are written CR and CW.2. INCOMPLETE DOMINANCE: occurs when BOTH alleles BLEND together to form a SINGLE intermediate trait. The notation is just a capital letter of each allele type; for example, a RED carnation (RR) crossed with a WHITE carnation (WW) will form PINK carnation (RW) offspring because both traits are expressed and blended together (NOT SEPARATE AS IN CODOMINANCE).
We then began a lab on human pedigree charts based on dominant/recessive alleles for certain traits.
AP Chem- began our Thermo unit by reviewing the main Laws of the Universe: the 0th and 1st Laws of Thermodynamics i.e. thermal energy always flows (net) from higher temperature matter to lower temperature matter and that energy can neither be created nor destroyed, respectively.
We then discussed the mathematical and physical meaning of entropy and its units of measurement, Joules per K; molar entropy is in Joules per mole-K.
We reasoned entropy changes for various processes such as melting, freezing, sublimation, etc.
The Ksp/Salt Solubility/Buffer-Titration exam will be given next Tuesday.
Bio 6- we discussed the two possible crosses between an organism that shows the DOMINANT phenotype (either the TT genotype or the Tt genotype will cause the dominant phenotype of tallness in pea plants) and an organism that shows the RECESSIVE phenotype (which MUST be the tt genotype, only).By analyzing the percentage of offspring with the dominant or the recessive phenotype, we could infer/conclude the GENOTYPES of the parents even though we cannot physically see the genes because they are at the molecular size level.We then saw that not all genes come in just the dominant and recessive forms.There are two distinct types of INTERMEDIATE DOMINANCE:1. CODOMINANCE: occurs when BOTH alleles are expressed fully and SEPARATELY (NO BLENDING!) phenotypically. The notation used is a capital letter for the trait with a SUPERSCRIPT of the actual allele type; for example, a roan horse has both red AND white hairs, so the alleles are written CR and CW.2. INCOMPLETE DOMINANCE: occurs when BOTH alleles BLEND together to form a SINGLE intermediate trait. The notation is just a capital letter of each allele type; for example, a RED carnation (RR) crossed with a WHITE carnation (WW) will form PINK carnation (RW) offspring because both traits are expressed and blended together (NOT SEPARATE AS IN CODOMINANCE).
Bio 7/8-we discussed the two possible crosses between an organism that shows the DOMINANT phenotype (either the TT genotype or the Tt genotype will cause the dominant phenotype of tallness in pea plants) and an organism that shows the RECESSIVE phenotype (which MUST be the tt genotype, only).By analyzing the percentage of offspring with the dominant or the recessive phenotype, we could infer/conclude the GENOTYPES of the parents even though we cannot physically see the genes because they are at the molecular size level.We then saw that not all genes come in just the dominant and recessive forms.There are two distinct types of INTERMEDIATE DOMINANCE:1. CODOMINANCE: occurs when BOTH alleles are expressed fully and SEPARATELY (NO BLENDING!) phenotypically. The notation used is a capital letter for the trait with a SUPERSCRIPT of the actual allele type; for example, a roan horse has both red AND white hairs, so the alleles are written CR and CW.2. INCOMPLETE DOMINANCE: occurs when BOTH alleles BLEND together to form a SINGLE intermediate trait. The notation is just a capital letter of each allele type; for example, a RED carnation (RR) crossed with a WHITE carnation (WW) will form PINK carnation (RW) offspring because both traits are expressed and blended together (NOT SEPARATE AS IN CODOMINANCE).
We then began a lab on human pedigree charts based on dominant/recessive alleles for certain traits.
# posted by C @ 3:05 PM 
