The nurse assesses a patient's family health history for three generations. This nurse is determining the patient's:
1. Pedigree.
2. Expressivity.
3. Inheritance.
4. Penetrance.
Pedigree.
Rationale:
Recognizing patterns of inheritance and clustering of diseases within families can be determined based on a thorough family history that is organized into a family tree, called a pedigree. Pedigrees enable the health care provider to visualize how diseases and characteristics are clustered within a family and through generations. Expressivity is the degree to which a person with a specific genotype is affected. Penetrance is the proportion of individuals who have the genotype and actually manifest the disease or trait. Inheritance refers to the clustering of diseases through the recognition of genetic patterns.
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