Allele Frequency: It can be calculated directly by counting the number of alleles of one type at a given locus and dividing it by the total number of alleles at that locus in a sampled population.
Genotype Frequency: It can be calculated by dividing the number of individuals with one genotype by the total number of individuals in a sampled population. Each genotype at the locus can be calculated separately.
Heterozygosity: The proportion of alleles, at a given locus, that are heterozygous.
Hardy–Weinberg Principle: It allows predictions of genotype frequencies to be made based on allelic frequencies.
Observed Genotype Frequencies: Are calculated by dividing the number of individuals with one genotype by the total number of individuals in the population sampled.
Population Match Probability: The probability of having a matching genotype between two randomly chosen individuals.