Phenotype variation is due to the additive effects of genetic variance and environmental variance.  In an inbred of mice, the variance for the body fat was 325.  Under the same environmental condition, the variance for body fat of genetically heterogeneous mice was 1000.  The genetic variance for the heterogeneous mice is

A (                             ) converts a (                                 ) to its mutant form known as an oncogene.

To estimate the heritability of maze-learning ability in rats, a selection experiment was carried out. From a population in which the average number of trials necessary to learn the maze was 10.8.  Animals were selected that managed to learn the maze in an average of 5.8 trials.  Their offspring required an average of 8.8 trails to learn the maze.  Calculate the narrow-sense heritability of maze-learning ability in this population.

Saying that a quantitative trait exhibits a continuum means that

21. Explain the terms London Dispersion Forces, dipole-dipole interactions, and hydrogen bonding according to their relative strengths as Intermolecular forces.

Assume we have an autonomous differential equation $$dy/dt = f(y)$$ with parameter k. Assume a,b,c,d, and e are real numbers and that the phase lines result from the given k values below. Select ALL of the following statements which are true.

A. Name the structure. B. Name the structure. C. Name the nerves. D. Name the nerves.

A 28-year-old patient comes for intractable headache.  She was tried on multiple medications with no response.  She started having blurred vision recently.  Her exam is normal except early papilledema.  Imaging study of the brain was unrevealing.  You recommended lumbar puncture.  All CSF tests were normal, except increased CSF opening pressure of 35 cm of water (normal 8-19).  Of the following medications, which one is the LEAST likely to be the reason for this patient’s problem?

A 72-year-old woman with uncontrolled hypertension presents to the emergency department with altered mental status.  His blood pressure is 210/130 mm Hg, pulse is 110/min, and oxygen saturation is 99% on room air.  CT of the head reveals a posterior fossa bleed. One hour later the patient goes into respiratory failure.  Which of the following is the most likely etiology?

16.A 45 year old woman presents to the neurology office with excessive daytime sleepiness. During a polysomnogram she has at least 9 episodes per hour in which she stops breathing for approximately 11 seconds. Sometimes these are associated with arousals. Despite absent airflow she has respiratory effort during these episodes. Which of the following is correct?