Which diagram shows genetic traits across generations?

A pedigree is a diagram that is specifically designed to illustrate the inheritance of genetic traits across multiple generations within a family. It allows for the visualization of which individuals express certain traits and how these traits are passed from one generation to the next. Pedigrees are commonly used in genetics to track hereditary conditions, identify carriers, and evaluate the risk of genetic disorders in offspring.

In contrast, a karyotype is a visual representation of the chromosomes in a cell and is used to assess chromosomal abnormalities rather than specific traits across generations. Genotype refers to the specific genetic makeup of an individual, while phenotype describes the observable characteristics resulting from the genotype, such as physical traits or behaviors. These terms focus more on the attributes of individual organisms rather than on the inheritance patterns that pediatrics provide. Therefore, the pedigree is the most appropriate choice for showing genetic traits across generations.