Michael and Michelle Are Adolescents Who Share the Same Birthday

question 120

Multiple Choice

Michael and Michelle are adolescents who share the same birthday. Michael received a diagnosis of bipolar disorder. On the other hand, Michelle shows no signs of mood disturbance. Which of the following statements is most likely true?

• A) Michael and Michelle are most likely monozygotic twins but Michael is genetically predisposed to develop a mood disorder
• B) Michael and Michelle are most likely dizygotic twins but Michael developed the disorder because he modeled behaviours of other family members
• C) Michael and Michelle are most likely dizygotic twins but Michelle did not develop the disorder because the concordance rate was extremely low
• D) Michael and Michelle are most likely monozygotic twins but Michelle did not develop the disorder because she has a higher tolerance for stress

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Definitions:

Leukocyte

A type of blood cell that is part of the immune system, also known as a white blood cell.

Eosinophil

A type of white blood cell involved in allergic reactions and combating parasitic infections.

Basophil

A type of white blood cell characterized by the presence of granules that stain with basic dyes, playing a role in immune responses, particularly allergic reactions.

Leukocyte

A white blood cell, part of the immune system, involved in protecting the body against both infectious disease and foreign invaders.