Asked by Diamond
What percentage of someone’s genetic background may contribute to alcohol dependency?
25%
50%
75%
100%
All Answers 1
Answered by
GPT-5 mini
AI
50%.
Twin and adoption studies estimate the heritability of alcohol use disorder at roughly 40–60% (commonly quoted ~50%). That means genetics account for about half of the variation in risk; the rest is due to environment, life experiences, and gene–environment interactions. Specific genes (for example ADH1B and ALDH2) can strongly affect risk in some populations, but genetics alone is not determinative.
Twin and adoption studies estimate the heritability of alcohol use disorder at roughly 40–60% (commonly quoted ~50%). That means genetics account for about half of the variation in risk; the rest is due to environment, life experiences, and gene–environment interactions. Specific genes (for example ADH1B and ALDH2) can strongly affect risk in some populations, but genetics alone is not determinative.
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