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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?
Another dog, Billy, has three restriction sites for this enzyme in his genome. For this problem suppose there is only one chromosome in dogs.
In order to perform a fluorescence experiment, you need to seed a 4-well chamber slide with 60,000 cells in each well. To prepare for the cell count, you transferred twenty uL of cell suspension into thirty uL of trypan blue.
If we ignore the possibility of crossing over, how many different combinations of chromosomes are probable in gametes of a single human.
What is the amino acid sequence of this peptide. Does the calculated (CAI) value support the hypothesis that the gene encoding the seven amino acid peptide is likely to be foreign gene?define .
The organism may well potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which structures would allow for the most certain identification of the organism.
What is the rate of coagulation of naturally occurring colloids (under various pH and I scenarios)? How may the size spectrum of agglomerates change over time? How quickly do colloidal aggregates settle.
Using information provided, what is the hydrogen/helium content inside a star that is the approximate age of our sun. what aspects are consequences of the evolutionary history of animals you are considering.
Assume you wish to get a look at what species of organisms are in your mercury contaminated samples. How could you quickly identify the species present in this very large sample of unknown organisms?
A cross is made in a haploid strain of Neurospora of genotype nic + ad and another haploid strain of nic ad + . From the cross, a total of 1000 linear asci are isolated and characterized as in the following table.
What are the physical changes needed in the body that would require to happen in order for our bodies to live forever. Changes such as telomerase activity, collagen flexibility, environmental changes, role of the immune system, DNA repair enzymes:..
Rifamycin and actinomycin D are two antibiotics derived from bacterium Streptomyces. Rifamycin binds to b subunit of E. coli RNA polymerase and interferes with formation of the first phosphodiester bond in the RNA chain.
Assume you isolate a mutant e.coli strain that is unable to grow without tryptophan supplementation at 37 degrees C but grows normally at 25 degrees C.
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