Coefficient of Relatedness

Coefficient of relatedness refers to probability that two related individuals have inherited a particular allele of the single locus / gene from their common ancestor (such allele is referred to as IBD - identical by descent). The coefficient is calculated as follows

$$r=\left(\frac{1}{2}\right)^n$$

where n represents the number of steps in genealogy.

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 * Coefficient of Inbreeding