Identical Twins Jada and Olivia Were Very Similar in Personality

question 67

Multiple Choice

Identical twins Jada and Olivia were very similar in personality throughout childhood. After high school, Jada majored in music and became an elementary school teacher, while Olivia earned a medical degree and joined Doctors Without Borders, traveling to countries gripped by war and epidemics. Later in life, Olivia was more prone to risk-taking than Jada. This difference in personality is a result of

• A) niche-picking.
• B) alterations to Olivia's chromosome-5 gene.
• C) mutations in Olivia's DD genetic makeup.
• D) methylation.

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Definitions:

Saccades

Rapid, ballistic movements of the eyes that abruptly change the point of fixation, allowing the visual system to quickly move from one object of interest to another.

Retinal Fixations

Moments when the eye remains stationary, focusing on a single point in the field of vision.

Dilations

The process of expansion or enlargement in part or area, often used in medical contexts such as the dilation of pupils or blood vessels.

Optic Chiasm

A crucial structure in the brain where the optic nerves partially cross, playing a key role in the visual processing system.