Memory Biology: Basic Genetics Memory MatchVersión en línea Memorize key genetics terms by pairing each concept with its definition. por Alicia Pearce Genotype Hidden when the dominant trait is present. DNA code that determines which traits show. Chromosomes The passing of traits from parents to offspring. Visible features you can see. Alleles Different forms of a gene. Dominant Threads inside a cell carrying genes. Nucleus The cell's control center storing instructions. A trait that always shows up. Phenotype Heredity Recessive