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<p>CSV import</p> <p><b>New page</b></p><div>[[File:Coefficient_of_relatedness.png|thumb|Coefficient_of_relatedness.png]] &#039;&#039;&#039;Coefficient of relationship&#039;&#039;&#039;<br /> <br /> The &#039;&#039;&#039;coefficient of relationship&#039;&#039;&#039; is a measure used in [[genetics]] to quantify the degree of [[genetic relatedness]] or [[kinship]] between two individuals. It is defined as the probability that a randomly selected [[allele]] from one individual is identical by descent to a randomly selected allele from another individual. This concept is crucial in the study of [[population genetics]], [[evolutionary biology]], and [[conservation biology]].<br /> <br /> == Calculation ==<br /> The coefficient of relationship is calculated based on the [[pedigree]] of the individuals. It is often denoted by the symbol &#039;&#039;r&#039;&#039;. The value of &#039;&#039;r&#039;&#039; ranges from 0 to 1, where 0 indicates no genetic relationship and 1 indicates that the individuals are genetically identical.<br /> <br /> The coefficient of relationship can be calculated using the following formula:<br /> <br /> &lt;math&gt; r = \sum (0.5)^n &lt;/math&gt;<br /> <br /> where &#039;&#039;n&#039;&#039; is the number of [[generations]] between the individuals through their most recent common ancestor.<br /> <br /> == Common Relationships ==<br /> Here are some common relationships and their corresponding coefficients of relationship:<br /> <br /> * [[Parent]] and [[offspring]]: 0.5<br /> * [[Full sibling]]s: 0.5<br /> * [[Half sibling]]s: 0.25<br /> * [[Grandparent]] and [[grandchild]]: 0.25<br /> * [[First cousin]]s: 0.125<br /> <br /> == Applications ==<br /> The coefficient of relationship is used in various fields:<br /> <br /> * In [[genetic counseling]], to assess the risk of inherited disorders.<br /> * In [[animal breeding]], to manage [[inbreeding]] and maintain genetic diversity.<br /> * In [[conservation biology]], to design breeding programs for endangered species.<br /> * In [[evolutionary biology]], to study the evolution of social behaviors such as [[altruism]].<br /> <br /> == Related Concepts ==<br /> * [[Inbreeding coefficient]]: A measure of the probability that an individual has two identical alleles for a given gene due to inheritance from common ancestors.<br /> * [[Kin selection]]: A form of natural selection that favors the reproductive success of an organism&#039;s relatives, even at a cost to the organism&#039;s own survival and reproduction.<br /> <br /> == See Also ==<br /> * [[Genetic distance]]<br /> * [[Pedigree chart]]<br /> * [[Population genetics]]<br /> * [[Heritability]]<br /> <br /> == References ==<br /> {{Reflist}}<br /> <br /> == External Links ==<br /> {{Wiktionary|coefficient of relationship}}<br /> <br /> [[Category:Genetics]]<br /> [[Category:Population genetics]]<br /> [[Category:Evolutionary biology]]<br /> [[Category:Conservation biology]]<br /> [[Category:Genetic genealogy]]<br /> <br /> {{genetics-stub}}</div>

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