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Write out a brief explanation too on your document and insert your cell pix of notes. Choose your own letters to symbolize the genes, and then show the crosses (& punnett squares) from the P to the F2 generation. Weirder! What was going on? The corn guy correctly deduced that 2 genes might be involved. If you counted all the kernels from single cobs, or large groups of cobs, the ratio of purple to white seeds was always 56% purple to 44% white. Weird! When 2 of these F1 purple plants were crossed to get the F2's, all the cobs were mixed purple and white separate seeds. About 100 years ago a geneticist crossed 2 pure-bred varieties of white corn (neither of which showed any purple in their seeds) and was surprised to find that ALL the F1 offspring plants had cobs with all purple seeds. Here's the problem, which is epistatic in inheritance and similar but not identical to the dog coat epistasis: Corn comes in many kernel color varieties (yellow, white, red, purple, indian, etc.). Work it out neatly in your notebook and then take clear well lit cell pix of your work and upload them in a DOC to Turnitin by Sun eve 11 pm. Try to explain how the following corn genetics case works. Required WRITTEN HW : After reading & reviewing Epistasis (labrador dog coat color example & diagram). HW for 1st mtg : STUDY ALL of Ch 12 Chromosomal Basis of Inheritance.
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Write out a timeline of how long you expect each part of the setup and expt to take. Your design needs to include how much/how many of equipment / materials you need, how you will set up and run the experiment, what you're trying to find out. I have extra new petri dishes, media, flies, etc. It may use any of the flies and fly materials we've been working with so far this year. You can set it up one day and then collect data the next. It may involve choice of fruits or something else but must be easy to set up and run in one 90 min class period or spread over two classes.
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It is open-ended and can involve any type of behavior we have previously discussed or something new. It must have at least 2, but no more than 3, alternate choices, and include an appropriate control for the flies to choose from. It needs to be easy to set up, run, and collect data. This might involve adult or larval flies and a choice involving where to feed or lay eggs. The behavior you investigate should involve the flies making a choice about something in their environment. Weekend Written HW: Design/write up the outline of a controlled expt that will investigate some aspect of Drosophila fruit fly behavior. HW for 1st mtg : Study ALL assigned Behavior pages for multiple choice reading Quiz. IF you want to try and see if you can get to this website, Johnson Explorations, they have a great fly recombination activity, Constructing a Genetic Map, but it needs Adobe Shockwave to work. QUIZ Prep problems/websites-please try to do/watch these after reading about recombination: Recombination frequency and gene mapping (practice) | Khan Academy BOZEMAN Genetic Recombination and Gene Mapping Recombination Frequency and Linked Genes MIT lecture on Genetics/Recomb (38 min)by Erik Lander (one of the country’s most famous geneticists today) you can jump thru it to find recomb (about 13 min into video). Review session Monday before school at 735 aam in 405. You have to wrestle with it a bit to figure it out. The quiz problem is very similar to the fly example done for you in Ch 12. Watch the Bozeman Science video below and then try the Khan Academy problems to begin. See your book Ch 12, study guide/test prep book, and problems below to see how recombination problems work. There will be a SHORT fly recombination genetics quiz on Monday. The Species Problem - Various ways to define species Harvard's Horizontal Gene Transfer Molecular Evolution and The Early Earth Speciation in Gators Learn Genetics: Variation + Selection & Time Evolution in Action Allele frequency, the Hardy Weinberg Equation, and Applying the equationĬleearly Stated's What is evolution?, Evidence of Evolution and Chemical Evolution and Can Evolution Explain the Origin of Life? The Three Domains of Life (start at 3 min - end) The Essential Characteristics of Life are Conserved & Evolution of Eukaryotes Populations Continue to Evolution (Types of selection) Mechanisms to increase variation (in bacteria and eukaryotes) Intro to Hardy Weinberg & Population Genetics Population Variation (Examples at the population level, calculate allele frequencies (HW)) Cellular Variation (Examples, Heterozygous Advantage, Gene Duplication) Anderson (Bozeman ) will walk you through