| A | B |
|---|
| Punnett Square | diagram used to predict the outcome of a genetic cross |
| Heterozygous | individual with 2 different alleles for a trait |
| codominant | condition where both alleles for a gene are expressed when present |
| homozygous | individual with 2 identical alleles for a trait |
| allele | an alternative form of a gene |
| incomplete dominance | where the trait is intermediate between the phenotype of its 2 parents |
| F2 generation | the offspring from crosses among individuals of the F1 generation |
| P generation | the first 2 individuals that mate in a genetic cross |
| polygenic trait | characteristic of an organism influenced by several genes |
| dominant | genetic trait that is expressed when its allele is homo or heterozygous |
| recessive | trait that is not expressed when the contrasting form is present |
| test cross | a cross of an individual whose phenotype is known, but not its genotype |
| genetics | the study of heredity |
| multiple alleles | the existence of more than 2 alleles |
| true breeding | displaying only one form of a trait in offspring |
| monohybrid cross | cross involving one pair of contrasting traits |
| F1 generation | the 1st offspring from a cross of 2 varieties in the P generation |
| heredity | transmission of genetic traits from parent to offspring |
| probability | the likelihood that a specific event will occur |
| phenotype | observable characteristics of an organism |
| genotype | the genetic makeup of an organism as indicated by its set of alleles |
