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Question: Each olfactory receptor (OR) gene is involved in detecting specific odors. However, humans are losing OR genes: while mice and other mammals have ~1500 such genes, humans have ~900 (the rest received deactivating mutations that turned them into pseudogenes). One such gene is associated with detecting the odor of an asparagus breakdown product in urine; it is active in 25% of humans but has been deactivated in the rest of the human population. Imagine you figured out which OR gene was associated with the trait, and found that individuals with two broken copies (aa) lost the ability to detect asparagus in urine, while those with at least one intact copy (AA or Aa) were able to detect it. In a population analysis, you found 3 AA, 22 Aa, and 75 aa individuals. Test for HW equilibrium and draw conclusions about evolutionary forces acting on the population. Were you able to detect the activity of mutation in the population? Why or why not, do you think? (Hint: At what rate do mutations accumulate in a population?)
Madagascar, Indonesia and the Amazon basin have some of the greatest numbers of different species concentrated in a single area. What kinds of environments do you think encourage greater biodiversity.
The muscles that originate on the ischium and sacrum are" Adductors of the thigh. Abductors of the thigh. Medial rotators of the thigh.
What are the steps in enzyme-substrate reaction. The enzyme most frequently study is bovine alkaline phosphatase. Alkaline phosphatase hydrolyze the artificial substrate p-nitrophenylphosphate (pNPP) giving us a way to create quantitative measu..
During gym class Sally noticed that her friend Melissa always ran faster than her. Sally knew that they exercised equally, so she wondered what could cause Melissa to run so fast.
Explain the Hershey-Chase experiment. Describe in your own words, as if you were talking to someone with no genetics background.
Diffusion is defined as the movement of solute molecules from a region of high concentration to low concentration. To learn about some of the factors that affect the rate of diffusion,How would increasing temperature affect diffusion rate
define in your own words how Christian Anfinsen's ribonuclease renaturation experiments showed that amino acid sequence determines tertiary structure.
The global community is plagued by increasing incidence of lung cancer, colorectal cancer, breast and pancreatic cancers, prostate cancer, non Hodgkin lymphoma, liver, ovarian and esophageal cancers.
suppose a bird that eats grasshoppers moves into the prairie. How will this affect natural selection of the grasshoppers? How might this change in a drought year.
What effect do you think EBV would have on B cell function. What phenotypes would you expect in the F2, and in what actual numbers (not ratios) will you expect to find out them.
The body temperature in humans is maintained about the 37 C. Which characteristic of life does this statement represent? Living things respond to stimuli. Living things are homeostatic.
Snouters are small critters that live on both sides of Ohio River. A population on the north side of the Ohio River is fixed for an allele for blue feet.
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