A chart showing the presence and absence of phenotypes in multiple generations of a family is called aMultiple choice question.

The answer to the question is a "pedigree chart."

A pedigree chart is a diagram that illustrates the appearance (phenotype) or absence of specific traits across multiple generations of a family, making it an essential tool in genetics and biology. Typically represented using symbols, a pedigree chart uses squares to denote males and circles for females, with lines connecting individuals to indicate relationships and offspring. This graphical representation allows geneticists and researchers to track the inheritance of traits, assess the probability of inheriting specific phenotypes, and identify any patterns of genetic inheritance, whether dominant or recessive. Pedigree analysis is crucial for understanding hereditary diseases and disorders, and it can also provide insights into familial lineage and genetic predispositions.