Use Expected Heterozygosity when you need to compute expected heterozygosity he = 1 - (p^2 + q^2) at a two-allele locus. Enter Allele A frequency using the definitions and units below so the result can be reproduced.

Allele A frequency

A finite measured or assumed value from 0 through 1.

The published tool contract uses this rule: Compute expected heterozygosity he = 1 - (p^2 + q^2) at a two-allele locus.^[1]

Expected heterozygosity

The calculated expected heterozygosity.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability. Allele A frequency must remain between 0 and 1.

Retain the original Allele A frequency values and their units alongside the result. Observed Heterozygosity is useful when you instead need to compute observed heterozygosity as the fraction of individuals that are heterozygous. Chao1 Bias Corrected provides another view by helping you compute the documented bias-corrected Chao1 estimate as observed species plus singletons times singletons minus one divided by two times doubletons plus one.

• Observed Heterozygosity

  Compute observed heterozygosity as the fraction of individuals that are heterozygous.

• Chao1 Bias Corrected

  Compute the documented bias-corrected Chao1 estimate as observed species plus singletons times singletons minus one divided by two times doubletons plus one.

• ACE Bias Corrected

  Estimate abundance-based species richness with ACE using the species observed at most ten times, their total individuals, singleton count, and the rare-frequency moment sum i(i-1)f_i. ACE is undefined when every rare individual is a singleton.