Hardy-Weinberg Equilibrium Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t4-134

Effect

Computation or source lookup only

Input and validation requirements

The count-derived frequency path breaks at population_size=0 because it requires division by zero. The instrument should reject that input explicitly. A separate convention hazard exists because swapping the meanings of p and q reverses the AA and aa outputs.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "p": 0.6,
    "q": 0.4,
    "population_size": 100
  },
  "expected_outputs": {
    "p": 0.6,
    "q": 0.4,
    "expected_AA_frequency": 0.36,
    "expected_Aa_frequency": 0.48,
    "expected_aa_frequency": 0.16,
    "expected_AA_count": 36,
    "expected_Aa_count": 48,
    "expected_aa_count": 16
  },
  "working": "p+q=0.6+0.4=1.0. p²=0.6×0.6=0.36. 2pq=2×0.6×0.4=0.48. q²=0.4×0.4=0.16. Check: 0.36+0.48+0.16=1.00. Counts: 100×0.36=36, 100×0.48=48, 100×0.16=16."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche4/tranche4-results.json