Final answer:
A pedigree chart is a genetic tool used to track the inheritance of a specific trait through generations. In this case, the trait is determined by a single gene (a monogenic trait), represented by filled symbols for those who possess it.
Step-by-step explanation:
The pedigree chart represents a model used in genetics to demonstrate the family history of a particular trait that is genetically inherited. The filled symbols represent individuals who possess the trait in question. If the trait is determined by a single gene, it means it is a monogenic trait. Use of such charts helps in understanding how these traits are transferred from one generation to another. It is also useful in predicting the possibility of an individual inheriting a monogenic trait. It might be a dominant trait, which requires only one copy of the gene to manifest, or a recessive trait, requiring both copies.
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