A Cardiac Researcher Is Trying to Determine If a Pattern

A cardiac researcher is trying to determine if a pattern of very high blood cholesterol is genetic in a group of Pennsylvania Dutch.Therefore,the scientist looks through years of medical records,plus patterns of marriage through several generations.The investigator is doing a type of hereditary research called ________.

A) back crossing
B) pedigree analysis
C) linkage mapping
D) title searching

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