Today we discussed the importance of applying principles of gene mapping to calculating the risk of a person inheriting an allele responsible for a genetic disorder, by observing the inheritance of a marker gene (i.e. a closely linked gene with an easily observable phenotype).
Three pedigrees were analyzed, to determine the genotypes of all of the portrayed individuals and if they were parental types or recombinant types. Once this information was available the odds ratio is calculated as an estimate of how closely linked the genes are.
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