SCH 3U
Pipette Practice
Q 19-22 p. 248-249 (HMK if not done in class)
SBI 4U
Translation
In Class Activity DNA-RNA-Protein and Mutations
Q 2, 4, 9, 13 p. 241 (back of codon table handout)
Read text at top of codon table and explain the term redundancy and its importance to living organisms
Look up the term "wobble hypothesis" as it relates to the genetic code
DNA Timeline due Monday
Practice Transcription and Translation Q's handed out
Quiz Wed Dec 1
SNC 1PE
Quiz Today
Rocket Lab
Ms.Wiens,
ReplyDeleteThe World Aids conference is on Wednesday and some of us will be gone on that day. What are we going to do about the quiz?
Also, we're not finding anything for the DNA timeline in the 21st century. Can you give us hints on what you expect to see in these years?
I have informed Ms. B about the quiz Wednesday. If you absolutely must go you will write the quiz Tuesday. There will be a VERY important Lab Thursday which we will be preppping for Wednesday.
ReplyDeleteThere are MANY discovries in the 21st Century some of which are listed on the suggested site I gave you.
Lina - you are not on the posted list to attend the conference.
ReplyDeleteI'm not going with Ms. B. I'm going with Ms. Jameison and Ms. Poole, but I wont go since we'll be preparing for a lab.
ReplyDeleteQ 2, 4, 9, 13 p. 241 (back of codon table handout)
Did anyone get question 9?
In a hypothetical situation, 85 amino acids exist and there are still only 4 nucleotides found in nucleic acid. Calculate the minimum number of nucleotides required to code for this large number of amino acids. What is the maximum number of amino acids your answer would code for?
I wasn't aware Ms. P and Ms. J were also going with students. We'll talk as a class on Monday and figure out the week - though the quiz might have to be Tuesday.
ReplyDeleteFor the Question think about this information to help you answer. DNA consists of 4 different nucleotides (with the bases A, T, C and G), and there are 20 different amino acids.
One nucleotide is obviously not enough, since only four amino acids could be encoded this way. A pair of nucleotides (AA, AT, AG...etc.) would be insufficient, too, since they would result in 4^2 = 16 possible codons, not enough for 20 amino acids. So what about a triplet code? 4^3 = 64 codon possibilities exist here. (Why there are 64 codons for 20 aa relates to both the redundancy of the code and to the wobble hypothesis)
So how could we end up with 85?
Ms. how long did you want our information on the time line to be? I don't remember exactly but didn't you say you it should be shorter than the information you gave us?
ReplyDeleteBecause mine is quite lengthy... for example :
1866
Gregory Mendel bred pea plants and cross pollinated them to study how pea plant traits are inherited. He reasoned that traits like seed colour and length are controlled by one gene. Each gene is called an allele, and a pair of alleles is called a genotype. Looking at phenotypes (visible traits) he identified dominant and recessive traits. Pants with two different alleles of a gene are heterozygous, and plants with identical alleles for a single trait are called homozygous . The results of his experiments led to propose the three laws of inheritance (1) the law of segregation, (2) the law of independent assortment, and (3) the law of dominance. Mendel published a paper of his experiments in 1866.
Is that too much? or did you just want a few sentences?
Yes way too much information - You'll be up all weekend doing it. To make it shorter, it might look like this.
ReplyDeleteMendel 1866 - Bred Pea Plants. Identified alleles and dominance and recessive traits from phenotype. Created 3 Laws (independent assortment, segregation, dominance)
Ms. Wiens,
ReplyDeleteFor the timeline, we have 32 dates. Is that too much?
Many dates is good, pages of information about each specific date is not good. Summarize.
ReplyDelete