What does it mean for a trait to be inherited in a dominant manner?

A trait is said to be inherited in a dominant manner when only one copy of the dominant allele is required for the trait to be expressed in the phenotype. This means that if an individual carries at least one dominant allele, that trait will manifest, regardless of whether the individual also has a recessive allele. For example, if the dominant allele for a trait is represented by 'A' and the recessive by 'a', both genotypes AA and Aa would display the dominant phenotype, while only the homozygous recessive genotype (aa) would show the recessive phenotype. This understanding lays the foundation for predicting inheritance patterns and understanding the functioning of alleles in genetics.