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Q1. A dairy farmer is interested in breeding cows that are both resistant to mad cow disease (as indicated by a blood test) and brown. Each of these traits is controlled by a single locus. Resistance (R) is dominant to non-resistance (r) and brown (B) is dominant to white (b). He has noticed that brown cows are often resistant and suspects that the two traits are actually controlled by a single gene with pleiotropic effects (as in that they are completely linked).
Q2. A 40-year-old male who was seropositive for HIV experienced abdominal pain, fatigue, and low-grade fever (38°C) for two weeks. A chest X-ray examination revealed lung infiltrates. Gram and acid-fast stains were negative. A viral culture revealed the cause of his symptoms: a large, enveloped polyhedral virus with double-stranded DNA. What is the disease? Which virus caused it? Why was the viral culture completed after the Gram and acid-fast stain results were obtained?
What percent of the population are homozygous dominant. What do you assume would be the effect on the switch of reversing orientation of one of the hix sites.
No structures needed but show all the substrates involved in each reaction and the name of the enzyme. Changed mechanism of the transmission of infectious bacterial diseases with examples.
Which is easier to dispose of in a flock of chickens? A recessive allele for erect combs or a dominant allele for feathered legs. How various generations would it take.
What proportion of male children in a large family will finally develop baldness in a marriage where both husband and wife are heterozygotes with genotype HnHb?
The patient lives near the San Luis Rey River and has no history of foreign travel, blood transfusion, or intravenous drug use. What is the disease? How was it obtained.
Which of the follow statements regarding cancer risk factors is false. Mutagens are generally not carcinogens.
What are the probable genotypes of all the parents. What specific benefits will cellular organelles have if enclosed by a cell membrane alike to the plasma membrane.
How various kilograms of diatoms are needed to build 1 metric ton (1000kg) of blue whale. Give details how filter feeding by blue whales enables them to grow so large.
At another locus, sepia eyes are inherited as an autosomal (non sex linked) recessive. The presence of the white eye phenotype (x superscript w x superscript w in females, x superscript y in males) masks sepia phenotype, so regardless of the sepia ge..
What is hydrogenase? How can this enzyme be used as part of a strategy to "improve" a Rhizobial strain used to inoculate legumes? Describe logic and provide the appropriate diagram.
What will the results be for each plant if light only in the 650 nm range is supplied? 500 nm range? 450 nm range? Put in plain words.What colour is each plant? Give details.
A middle-aged man comes in since he has noticed multiple small, blood-red, raised lesions over his anterior chest and abdomen for past numerous months. They are not painful and he has not known about any bleeding or bruising. He is concerned this mig..
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