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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?)
Enzymes greatly decrease the activation energy. Describe two of the ways they do this and be specific in terms of chemical mechanisms.
Make the statement that there is an equal number of all four bases (A, T, C, G) and that the sequence of bases is random, how often will a single operator be expected to appear by chance. What factors or clues lead you to this diagnosis.
Determine an extracellular biomolecule, agent, or nutrient that is endocytosed into the cell?
Discuss the difference between the Law of Segragation and the Law of Independent Assortment? During which phases of meiosis do these occur?
Determine what cells in the testis are responsible for the maintenance of a blood-testis barrier that protects sperm from being attacked by the immune system?
If narrow-sense heritability in the rabbit population is 0.7, what is an expected body weight among offspring of selected rabbits. What was the amount of cash paid on accounts payable for the period of the year ended December 31.
Find out the number of triplet codons feasible
Jean is 45 years old and fifty pounds overweight. For the last three weeks, Jean has experienced severe right upper gastric pain immediately after eating.
What are genotypes of all the individuals mentioned in this difficulty. What is the point of the agar dish not treated with X-gal.
A rare autosomal recessive disorder causes pink hair. A non-carrier male and an affected female marry. Think about the following pedigree and RFLP analysis prepared using HindIII.
What are the benefits of genetic engineering versus the potential risks. Critics claimed that the experiment was inconclusive. Which of the criticisms would be addressed by using a swan-necked flask in its place of the unsealed flask.
A sixteen year old boy named Jake was admitted into the emergency room complaining of headache, fever, stiffness of abdominal muscles and difficulty swallowing.
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