| A | B |
|---|
| alleles | different forms of a gene may have for a trait |
| dominant | describes a trait that covers up, or dominates, another form of the trait |
| genetic engineering | changing of a gene's DNA sequence by biological and chemical methods |
| genetics | study of how traits are inherited through the actions of alleles |
| genotype | genetic makeup of an organism |
| heredity | passing of traits from parent to offspring |
| heterozygous | organism that has two different alleles for a single trait |
| homozygous | organism that has two identical alleles for a single trait |
| incomplete dominance | production of a phenotype that is intermediate to those of the two homozygous parents |
| multiple alleles | term used when a trait is controlled by more than two alleles |
| pedigree | tool that shows the occurrence of a trait in a family |
| phenotype | physical expression of a particular genotype |
| polygenic inheritance | occurs when a group of gene pairs acts together to produce a single trait |
| Punnet square | tool used to predict results in Mendelian genetics; shows all the ways in which alleles can combine |
| recessive | describes a trait that is covered up or dominated, by another form of the trait |
| sex-linked gene | allele inherited on a sex chromosome |
