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The pedigrees above show the inheritance of traits. Shaded individuals have the condition; unshaded individuals do not. Carriers, if any, are not indicated. Circles indicate XX individuals and squares indicate XY individuals. Pedigree [b] is what we would expect to see for an autosomal dominant condition. Pedigree [c] is what we would expect to see for a Y-linked condition. Pedigree [a] is what we would expect to see for an X-linked recessive condition.

Eukaryotic cells can have regulatory regions associated with genes. What is true of these regulatory regions?

A gene has two different alleles: A1 and A2. Individuals who are homozygous for A1 have the same phenotype as heterozygotes. Based on this, we can conclude that _______.

Which of the following statements accurately characterize(s) epigenetic regulation?

Prescription eyeglasses are acceptable eye protection when handling blood.

Patients with chronic hepatitis B face an increased risk of developing pancreatitis.

Coughing and sneezing help to force pathogens from the body.

An anaerobe can exist only in the presence of oxygen.

Directions: Choose the best answer. Each question is worth 1.5 points. The most likely means of contracting hepatitis B in the health care setting is through

Directions: Choose the best answer. Each question is worth 1.5 points. Personal protective equipment must be used to