short non-fiction · science
A gene is not a sealed instruction for a life
A short idea drawn from The Gene: An Intimate History by Siddhartha Mukherjee.
Genes are DNA sequences that contribute to functional products, and inherited variants can strongly affect traits. But many traits emerge through networks of genes, regulation, development and environment. Even a variant associated with an outcome may alter probability rather than write an inevitable future.
This correction should not be inverted into “genes do not matter.” Some variants have large, well-characterised effects; others have tiny or context-dependent ones. The honest question is not whether a trait is genetic or environmental as if only one door may open. It is how biological inheritance works within the conditions through which an organism develops.
Based on the work of
Siddhartha Mukherjee
· 2016
Why this bookA careful history of heredity that keeps scientific power beside its ethical consequences.
What to keep in view
Genetic effects range from highly penetrant to small and context-dependent; each claim needs trait-specific evidence.