| definition | word |
| alternative forms of a gene | |
| Cell with two copies of each chromosome | |
| An observed trait that is the same whether the individual is homodygous or heterozygous; it masks the recessive form of a trait | |
| a cell with one copy of each chromosome | |
| trait that is masked by the dominant gene on the same chromosome | |
| When a homozygous recessive individual is crossed to an individual of an unknown genotype | |
| the exchange of genetic material during prophase I of meiosis. It results in new allele combinations | |
| When one gene masks the expression of another on a different chromosome | |
| when an individual carries two different alleles for a trait | |
| The physical position of a gene on a chromosome | |