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:

Amblyopia

Also known as "lazy eye," a vision development disorder where an eye fails to achieve normal visual acuity, typically due to poor transmission of visual images to the brain.

Melanin

A pigment that gives color to the skin, hair, and eyes, and plays a crucial role in protecting the skin against UV radiation.

Insulin

A hormone produced by the pancreas that regulates blood sugar levels by facilitating the uptake of glucose into tissues.

Prolactin

A hormone produced by the pituitary gland that stimulates milk production after childbirth and affects sex hormone levels.