| A | B |
|---|
| punnett square | diagram used by biologists to predict the outcome of a genetic cross |
| heterozygous | refers to an individual with two different alleles for a trait |
| codominance | condition in which both alleles for a gene are expressed when present |
| homozygous | refers to an individual with two identical alleles for a trait |
| allele | an alternative form of a gene |
| incomplete dominance | condition in which a trait in an individual is intermediate between the phenotype of its two parents |
| F2 generation | the offspring from crosses among individuals of the F1 generation |
| P generation | the first two individuals that mate in a genetic cross |
| polygenic trait | characteristics of an organism that is influenced by several genes |
| dominant | genetic trait that is expressed when its allele is homozygous or heterozygous |
| recessive | genetic trait that is not expressed when the contrasting form of the trait is present |
| test cross | a genetic cross of an individual whose phenotype is dominant but whose genotype is unknown |
| genetics | study of heredity |
| multiple alleles | the exsistance of more than two alleles |
| true-breeding | displaying only one form of a particular trait in offspring |
| monohybrid breeding | cross involving one pair of contrasting traits |
| F1 generation | the first offspring from a cross of two varieties in the parental (P) generation |
| heredity | transmission of genetic traits from parent to offspring |
| probability | the liklihood that a specific event will occur |
| phenotype | observable characteristics of an organism |
| genotype | the generic makeup of an organism as indicated by its set of alleles |
