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Q1. The sex linked (X linked) Xg locus in humans has two alleles, a+ abd a. The a+ allele causes the presence of Xg surface protein antigen on red blood cells, while the recessive a allele does not. The Xg locus maps 10 centimorgans from the STS locus. The recessive sts allele results in the lack of steroid sulfatase activity and homozygous females, as well as sts/Y males, develop ichthyosis, a form of scaly skin. A man with ichthyosis and no Xg antigens has a normal daughter with Xg antigens who is expecting a child.
a. If the child is a boy, what is the probability that he would lack the Xg antigen and have ichthyosis?
b. What is the possibility that the son would have both the Xg antigen and ichthyosis?
Q2. A man enters hospital complaining of chest pain. His history includes smoking, a stressful job, a diet heavy in saturated fats, lack of exercise, and high blood pressure. Although he is not suffering from a heart attack, his doctor explains to him that a heart attack is quite possible. What did the chest pain indicate? Why is the man a major candidate for a heart attack?
What is an inspiratory capacity (IC) of a person with a tidal volume of 505 ml and an inspiratory reserve volume of 1950 ml? Is this person male or female.
Compare and contrast gene expression in prokaryotes vs. eukaryotes from the standpoint of promoter sequences
Would you expect the measurements to be equivalent in both preparations? If a variation in size is expected, how will you account for this difference.
Which of the follow is NOT a function of meiosis. Generation of genetic diversity by crossing over.
What promotes exponential growth? What constrains population development.
What advantages do the O-Scale System and the Canadian Physical Activity, Fitness and Lifestyle Approach-Health Body Composition Assessment procedure has in evaluation to percent body fat predictions from skin folded measurements, when used in indivi..
What is the most likely defect associated with the Ser63 deletion mutant. How would you design an experiment to test your hypothesis using culture cells and the expression construct of wild-type and Ser63 deletion mutant of P0.
What changes took place from one group to another. What advantages did each progressive group have over the last? Will you categorize each as more sucessful than the last.
Briefly explain why this mating produces a triploid individual. Why can mitosis proceed normally in triploid cells, but meiosis cannot.
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins.
If amino acid sequences might be useful in determining how closely related dissimilar species are but may not be very useful for identifying a particular species, suggest two reasons why.
What is BOD and how is it determined. Dr. Haxton told one of his students, "To move in the bloodstream, fats need the help of phospholipids." What will a good student say.
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