Suppose a Researcher Is Studying Twins Where at Least One

question 77

Multiple Choice

Suppose a researcher is studying twins where at least one twin suffers from depression. The researcher finds that both twins are much more likely to share the disorder if they are monozygotic and not dizygotic twins. What should the research conclude?

• A) depression is entirely genetic
• B) the heritability of depression is high
• C) the heritability of depression is low
• D) monozygotic twins are at a higher risk for depression than non-twins

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Definitions:

Atherosclerosis

Cardiovascular disorder in which lipid-rich plaques form on the interior walls of blood vessels and narrow the vessels.

T Cell Receptors

Proteins found on the surface of T cells that allow these cells to recognize and bind to specific foreign antigens.

MHC Markers

Major histocompatibility complex markers, proteins found on the surfaces of cells that help the immune system recognize foreign substances.

Antigens

Substances that when introduced into the body, trigger an immune response, often by the production of antibodies.