| A | B |
|---|
| gene | specific region of DNA that codes for a particular protein |
| allele | any of the alternative forms of a gene that occurs at a specific place on a chromosome |
| homozygous | characteristic of having two of the same alleles at the same locus of sister chromatids |
| heterozygous | characteristic of having two different alleles that appear at the same locus of sister chromatids |
| genome | all of an organism's genetic material |
| genotype | collection of all of an organism's genetic information that codes for traits |
| phenotype | collection of all of an organism's physical characteristics |
| dominant | allele that is expressed when two different alleles are present in an organism's genotype |
| recessive | allele that is not expressed unless two copies are present in an organism's genotype |
