| A | B |
|---|
| Punnett square | a chart that shows all the possible combinations of alleles that can result from a genetic cross |
| phenotype | an organism's physical appearance, or visible traits |
| genotype | an organism's genetic makeup |
| probability | the likelihood that a particular event will occur |
| heterozygous | having 2 different alleles for a trait |
| codominance | a condition in which neither of 2 alleles of a gene is dominant or recessive |
| meiosis | the process that occurs in sex cells (sperm and egg) by which the number of chromosomes is reduced by half |
| homozygous | having 2 identical alleles for a trait |
