What is the primary purpose of a pedigree chart?

What is the primary purpose of a pedigree chart?

• A. Pedigree chart
• B. Punnett square
• C. Gel electrophoresis
• D. Karyotype

Answer: (A)

Tracking how traits pass through generations in a family is the main use of a pedigree chart. It shows family relationships and who is affected, using symbols for individuals and shading for those with the trait. By examining the pattern across generations, you can infer whether the trait is autosomal or X-linked and whether it behaves as dominant or recessive, which helps assess the risk for relatives to inherit the trait. Other tools have different purposes: a Punnett square predicts the possible genetic makeup of offspring from two known parents; gel electrophoresis separates DNA fragments to analyze genetic material; a karyotype images chromosomes to detect large-scale abnormalities. So the pedigree chart’s purpose is to map how a trait runs in a family over generations and estimate inheritance risk.

Tracking how traits pass through generations in a family is the main use of a pedigree chart. It shows family relationships and who is affected, using symbols for individuals and shading for those with the trait. By examining the pattern across generations, you can infer whether the trait is autosomal or X-linked and whether it behaves as dominant or recessive, which helps assess the risk for relatives to inherit the trait. Other tools have different purposes: a Punnett square predicts the possible genetic makeup of offspring from two known parents; gel electrophoresis separates DNA fragments to analyze genetic material; a karyotype images chromosomes to detect large-scale abnormalities. So the pedigree chart’s purpose is to map how a trait runs in a family over generations and estimate inheritance risk.