Genetic drift
Genetic drift is the change in the frequency of an existing allele in a population due to chance.
At a glance
Key signals
0% cross fields · reaches 0 more
- Biology
- Evolutionary Biology
- Genetics
- Explanation
- Examples
- Misconception
- Sourced relations
- Attribution
Structural role & consequence
Interpreted from the current atlas graph — what the connections mean, not just how many there are.
Currently dark in the atlas: no key date stored.
atlas representation · Describes the current Thinking OS representation, not the state of the world.
Structural neighbourhood: 1 → 19 → 89 concepts reachable within 3 hops.
structural · Structural reach — being reachable is not the same as being understood.
All 1 of its relationships stay within its own discipline — a field-specific concept in the current atlas.
structural · Structural graph analysis — not a claim of importance, causation or history.
cross-field
1 within-field, 0 cross-field
Strengths & constraints
Strengths
- Well-evidenced in the atlas — a verified source and 100% of its relations carry claim-level evidence. atlas representation
Constraints
- No dated history stored — the atlas records no key date for this concept. atlas representation
Seen through each discipline
How this concept sits in each of its fields — derived from its real connections in the graph, not asserted.
Through this lens it connects to Natural selection.
What it looks like
Concrete cases that make this idea recognisable in the real world.
The founder effect
When a few individuals colonise an island, the rare gene variants they happen to carry can become common in their descendants — not because they help, but purely by the luck of who founded the population.
Check yourself
A quick check against a common misconception. Nothing is scored — picking the tempting-but-wrong answer just flags an idea worth revisiting.
Which statement is correct?
All evolutionary change is adaptation driven by natural selection.
Genetic drift is random change in gene frequencies from sampling chance across generations. In small populations it can fix or lose variants regardless of any fitness benefit — evolution without adaptation.
Related ideas to explore
Concepts that look related but are not yet connected here — candidates for a connection to reason about, not established links.
This idea also appears in…
The same structure shows up in other disciplines. These are real recurrences drawn from the graph — a starting point for asking “what carries over, and what changes?”
Probability24 disciplines · 19 concepts
Concepts
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Mental models at work here
- Connects 1 other ideas across 3 disciplines.
- Most of its connections are of the “Analogy & transfer” kind.
- It exercises 1 reusable thinking pattern.
Derived from the graph’s real structure — observations, not a score.
Sources
- Wikipedia (English & German editions) verifiedmoderate evidence
- Wikidata verifiedmoderate evidence
- Biology 2e (OpenStax) (2018) verified