Description
Return fitnesses 1, 1-hs and 1-s.
Population-genetic fitness models use explicit allele frequencies, genotype fitnesses and generation rules. Relative fitness and a selection coefficient require a sign convention, and a deterministic update describes a model rather than an observed population trajectory.
Return fitnesses 1, 1-hs and 1-s.
When to use this tool
Use Selection Dominance Coefficient Fitness Gap when you need a supplied one-step fitness or allele-frequency relationship.
How to use the tool and how it works
- Enter selectionCoefficient, dominance. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read fitnessAA, fitnessAa, fitnessaa. Use the output convention below.
Require 1-selectionCoefficient and 1-dominance×selectionCoefficient nonnegative. Return fitnesses 1, 1-hs and 1-s.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| selectionCoefficient | Selection Coefficient | Required. Finite number. |
| dominance | Dominance | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| fitnessAA | Fitness AA | Required. Finite number. |
| fitnessAa | Fitness Aa | Required. Finite number. |
| fitnessaa | Fitnessaa | Required. Finite number. |
{
"input": {
"selectionCoefficient": 0.2,
"dominance": 0.5
},
"output": {
"fitnessAA": 1,
"fitnessAa": 0.9,
"fitnessaa": 0.8
}
}Limitations and assumptions
- Dominance and selection are not independently bounded to [0, 1]; negative selection or unusual dominance can be accepted. The reference-genotype convention must match the intended model.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a population model appropriate to mating, selection, mutation, migration and drift. Estimate parameters and uncertainty from suitable data instead of treating a supplied model step as a prediction.
References
Similar or alternative tools
- Selection Reference Fitness Sign
Return relative fitness and one minus that ratio as selectionCoefficient.
- Selection One Generation Allele Update
Return that mean and [p²wAA+p(1-p)wAa]/mean as nextP.