| A | B |
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| genetics | science of biological inheritance |
| genotype | describes the genes of an organism |
| phenotype | describes the appearance of a trait |
| dominant | allele that can cover up a recessive allele |
| probability | chance of an event happening |
| mutation | genetic change in the DNA |
| genetic disorder | harmful mutation produced by a gene or chromosome |
| sex linked inheritance | genes carried on the sex chromosomes |
| pedigree | record that show the inheritance a trait in a family |
| Punnett square | a way to predict the different type of offspring in a cross |
| heredity | passing of traits from one generation to the next |
| Mendel | father of modern genetics |
| nondisjunction | when two chromosomes fail to separate during meiosis |
| deletion mutation | piece of a chromosome is missing |
| cystic fibrosis | genetic disorder involving a gene mutation of the sodium channel protein |
| sickle cell anemia | gene mutation involving hemoglobin in red blood cell |
| incomplete dominance | when two different alleles together produce an intermediate (blended) phenotype |
| co-dominance | both genes in a heterozygote are expressed |
| pedigree | a record of inheritance patterns through several generations |
