In genetics, what is the combination of alleles in an organism called?

The combination of alleles in an organism is referred to as its genotype. This term specifically describes the genetic makeup of an individual, including the specific alleles present for each gene. Alleles are different versions of a gene, and the genotype can determine how that gene is expressed in the organism. This expression is observable in the phenotype, which refers to the physical and biochemical characteristics of an organism.

The genome relates to the complete set of genes or genetic material present in an organism, whereas a trait is a specific characteristic or feature that may result from the genotype. Therefore, the term that accurately identifies the combination of alleles is genotype, which underscores the significance of genetic variation and inheritance.