| A | B |
|---|
| dominant trait | the trait or allele that is expressed |
| recessive trait | the trait or allele that is present but that is not expressed |
| progeny | offspringq |
| siblings | brothers or sisters |
| Punnett square | used to represent genetic crosses |
| genotype | the genetic makeup of an organism |
| phenotype | the appearance of an organism |
| segregation | separation of genes |
| incomplete dominance | a case of contrasting alleles in which one allele is only partially dominant over the other; blending |
| recombination | mixing and recombining of genes |
| codominance | a case of contrasting alleles in which neither allele is dominant over the other, so both traits are visible |
| gene linkage | when genes for two different traits are located on the same chromosome pair |
| crossing over | during synapsis, chromatids of chromosomes often twist around each other, break, exchange segments and then rejoin |
| variability | the amount by which individuals in a population differ from one another due to their genes, rather than their environment |
