In a pedigreed chart, what is the primary purpose?

• A. Pedigree
• B. Carrier
• C. Sex-linked trait
• D. Autosomal

Answer: (A)

A pedigreed chart is a map of family relationships and how traits are passed down through generations. Its main purpose is to show who is related to whom and how a trait appears in relatives across generations, so you can visualize inheritance patterns and identify patterns like whether a trait tends to skip generations or affects both sexes. When you look at the chart, you’re mainly using it to understand the family structure and the transmission of traits—the pedigree itself. You can, of course, infer specifics such as who might be a carrier, whether a trait is sex-linked, or whether it’s autosomal from the diagram, but those are insights you gain from the chart, not the chart’s primary purpose.