Family studies are studies which are conducted to determine which common genes are shared by members of a family. Family studies help to determine the heritability of certain conditions and diseases. For example, a family study could be conducted for a certain disorder, X. Abnormal genes will be identified in the family members that have X and then these genes will be compared. If both family members have X and carry a certain gene abnormality then researchers can investigate whether this gene can predispose an individual to disorder X.
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