What is the equation for determining the incidence of a disease?
What will be an ideal response?
The number of new cases divided by the number of susceptible persons in the population
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The Pax6 gene
A. is a master control gene for eye development. B. codes for a protein that controls the expression of many other genes. C. mutant can cause aniridia in humans. D. is a homolog to the eyeless gene in Drosophila. E. All of the choices are correct.
Where in the body does the circadian clock act to control of vascular disease?
a. Systems under positive feedback control. b. Systems under negative feedback control. c. Systems that develop early in life. d. Systems that develop later in life. e. It is not known.
Map units on a linkage map cannot be relied upon to calculate physical distances on a chromosome because
A) the frequency of crossing over varies along the length of the chromosome. B) the relationship between recombination frequency and map units is different in every individual. C) physical distances between genes change during the course of the cell cycle. D) the gene order on the chromosomes is slightly different in every individual. E) all of the above
Pyelonephritis usually is caused by
A) Pseudomonas aeruginosa. B) Proteus spp. C) Escherichia coli. D) Enterobacter aerogenes. E) Streptococcus pyogenes.