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You are investigating 4 recessive alleles in corn. They are whimpy ears (w), striped leaves (s), shriveled kernels (k), and red tassels (r). Their dominant counterparts are represented by the "+" symbol. A plant that is homozygous recessive for all four genes (ww ss kk rr) is crossed with a plant that is homozygous dominant for all four genes (++ ++ ++ ++). The F1 progeny (w+ s+ k+ r+) are then testcrossed with another plant. A total of 1000 F2 progeny were produced. The F2 progeny display the following phenotypes.
Phenotype
Observed # of Progeny
w s k r
198
+ + + +
202
w s k +
201
+ + + r
199
w + k +
49
+ s + r
51
w + k r
48
+ s + +
52
a. Calculate the recombination frequencies between each pair of genes. (HINT: you will calculate 6 recombination frequencies - determine where each pair of genes experienced a crossover to produce the observed offspring).
b. Draw a chromosome map for these genes if they are linked.
If wind blows at 35 m/s^2 over the house, what is net force on the roof if its area is 240 square meters and the roof is flat? Show all work, with equation and substitution units.
Having learned an optimum sugar concentration, students next decide to investigate whether different strands of yeast ferment glucose to produce different amounts of alcohol. In brief explain how this experiment would be set up.
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Determine what impact would an inhibition of carbonic anhydrase have on, Osteoclasts, parietal calls, erythrocytes, epithelial cells of proximal tubules?
Explain anaerobic respiration in terms of an electron transport chain, proton motive force, electron donors and acceptors.
You ran your samples thorugh a 1% agarose gel. would you expect to get the same results if you ran your samples through 5% agarose gel? Explain your answer.
Assume your friend Charles D., is a forty-five year old male who is newly divorced and is living by himself in a new home. He has told you about some health issues including weight loss.
The flagellum is quite literally an outboard motor that few bacteria use to swim. It is rotary device that, like a motorboat, turns propeller to push against liquid, moving bacterium forward in process.
The X gene encodes a transcription factor needed for the activation of C gene. Describe these results and signify the genotypes of all individuals described within this problem.
If a 100X solution is 1 M, what is the concentration of a 1X solution? Explain how you would prepare 100 mL of a 0.5 percent w/v agarose in 1X TAE buffer starting with a 20X TAE stock solution and solid agarose powder.
An amateur horse breeder has acquired four new bay-coloured mares (female horses) with uncertain pedigree. What are the probable genotypes of the mares purchased.
About how long at the earliest is it likely to take before he gets feeling back in that part of thumb. Give two reasons that the wolf population is not at Hardy-Weinberg equilibrium.
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