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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 gene, 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; is it asctive 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 Hardy-Weinberg equilibrium and draw conclusions about evolutionary forces acting on the poluation. Were you able to detect activity of mutation in the population? Why or why not do you think?
The structure of biological membranes is estimated primarily by the lipid bilayer but the specific functions of these membranes are carried out through proteins associated with the membrane.
Think about the nature of negative-feedback control and the function of the respiratory system, what effect do you predict that a decrease in CO2 in the internal environment would have on how rapidly and deeply a person breathes?
At the end of the measurement period, which group will have produced the greatest volume of urine and which group the minimum? Describe your answer in details.
The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by which of the subsequent. movement of glucose into the cell through a glucose channel.
A man and a woman are both carriers for 2 autosomal recessive disorders, PKU and cystic fibrosis. If they have a daughter, what is the possibility that she will have PKU but not cystic fibrosis.
Explain the epidemiological attributes of this episode. In which special circumstances can cross-sectional surveys be utilized to test the hypotheses? In your answer explain briefly the characteristics of the cross-sectional study.
Should society subject pregnant women to dietary restrictions during pregnancy to protect the fetus from the effect of defective genes they carry.
At a talk by a visiting scientist, you learn about a strain of bakers' yeast that contains a mutation called gal1- in its galactokinase gene. Because this gene is needed to metabolize galactose, the mutant strain cannot grow in galactose medium.
Determine the health and environmental risk and benefits of genetically modified peanuts or almonds nut?
Discuss how it is that directional selection on quantitative traits can produce populations with trait distributions beyond what any parental generation had even without any new mutations creating new alleles.
What is basics of epidemiology, brief description on Understanding basics of epidemiology
Clarify how the procedure of meiosis assures that the chromosome number of a species remains the same from generation to generation.
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