A multiallelic gene is a gene with more than two alleles, or variations in its genetic sequence. There are several synonyms that can be used to describe this type of gene, including polymorphic gene, variable gene, and polygenic gene. Polymorphic gene refers to a gene with multiple forms or variations in a population, while variable gene is used to describe genes that exhibit variation within an individual or between populations. Polygenic gene refers to a gene that contributes to multiple traits or phenotypes. These synonyms are often used interchangeably to describe the complexity of genetic variation within a species.