Use Observed Heterozygosity when you need to compute observed heterozygosity as the fraction of individuals that are heterozygous. Enter Heterozygotes and Total individuals using the definitions and units below so the result can be reproduced.

Heterozygotes

An integer count or setting greater than or equal to 0.

Total individuals

An integer count or setting greater than or equal to 1.

The published tool contract uses this rule: Compute observed heterozygosity as the fraction of individuals that are heterozygous.

Observed heterozygosity

The calculated observed heterozygosity.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Heterozygotes and Total individuals values and their units alongside the result. Expected Heterozygosity is useful when you instead need to compute expected heterozygosity he = 1 - (p^2 + q^2) at a two-allele locus. Allele Count Total provides another view by helping you count total allele copies at a diploid locus as twice the number of individuals.

• Expected Heterozygosity

  Compute expected heterozygosity he = 1 - (p^2 + q^2) at a two-allele locus.

• Allele Count Total

  Count total allele copies at a diploid locus as twice the number of individuals.

• Coancestry Coefficient

  Compute the coancestry or kinship phi of two individuals as half of their additive relationship coefficient.