| A | B |
|---|
| heredity | passing on of characteristics from parent to offspring |
| heterozygous | having two different alleles for a trait |
| genetics | branch of biology that studies heredity |
| gene | section of chromosome that codes for a trait |
| dominant trait | observed trait of an organism that masks the recessive form of a trait |
| homozygous | having identical alleles for a trait |
| multiple alleles | having more than two alleles to determine a trait |
| allele | alternative forms of a gene for each variation of a trait |
| recessive trait | trait of an organism that can be masked by the dominant form of a trait |
| genotype | combination of genes in an organism |
| trait | characteristic that is inherited; can be dominant or recessive |
| phenotype | outward appearance of an organism |
| homologous | paired chromosomes with same arrangement of genes |
| mutation | change in DNA sequence caused by environmental factor or substance |
| hybrid | organism with 2 different alleles of a trait |
| diploid | cell with 2 sets of chromosomes |
| gametes | sex cells, ex. egg or sperm, haploid |
| mutagen | substance or environmental factor which causes a change in DNA |
