In this pedigree, a circle = female, and a square = male. Assume all individuals are homoplasmic, but people from different families have different DNAs.   How many different mitochondrial DNAs are present in this pedigree?

A gene locus has four alleles with frequencies of A1 (0.1), A2 (0.2), A3 (0.3) and A4 (0.4). What is the frequency of the A2A3 genotype in a population that is in Hardy-Weinberg equilibrium?

The phenomenon of anticipation is characteristic of

This question and the previous one are based on the same information.In guinea pigs, black fur is an autosomal dominant trait, and white is the alternative recessive trait. A Hardy-Weinberg population of 400 guinea pigs was found to contain 64 white individuals.Consider ONLY the BLACK animals in this population. What PERCENTAGE of these animals is expected to be HETEROZYGOUS?

Questions 28-30 are based on the same pedigree. This pedigree traces the inheritance of a rare autosomal recessive disease. Individual I-2 is known to be homozygous. Assume that q = 1/50 for this mutant allele, and that the population is in Hardy-Weinberg equilibrium.     The chance of III-2 being affected is approximately

The respiratory therapist in the intensive care unit (ICU) responds to a patient’s room because the ventilator is alarming. The most appropriate immediate action is which of the following?

A home care patient using NPPV complains that when she puts on the NPPV mask at night and turns on the machine, at first the gas feels like it is punching [her] in the face. The patient is noncompliant with the NPPV because of this. What action should the respiratory therapist take?

Setting flow rates higher will cause which of the following to occur?

To reduce the risk of tracheal damage associated with overinflated tube cuffs, intracuff pressures should not exceed what range of pressures?

Which of the following NPPV settings produces the greatest tidal volume