| A | B |
|---|
| traits | physical characteristics of organisms |
| genetics | the scientific study of heredity |
| alleles | the different forms of a gene |
| recessive allele | its trait is masked when with a dominant one |
| genes | factors that control traits |
| hybrid | an organism with two different alleles for a trait |
| heredity | the passing of traits from parent to offspring |
| dominant allele | this trait always shows up when present |
| heterozygous | an organism that has two different alleles for a trait |
| Punnett square | a chart that shows all possible allele combinations from a genetic cross |
| genotype | an organism's genetic makeup |
| codominance | pattern in which alleles are neither dominant nor recessive |
| probability | the likelihood that a particular trait will occur |
| homozygous | an organism that has two identical alleles for a trait |
| phenotype | an organism's physical appearance |
| Mendel | Father of Genetics |
| purebred | an organism that always produces offspring with the same form of a trait as the parent |
| eggs | female sex cells |
| sperm | male sex cells |
| meiosis | process where the number of chromosomes is reduced by half to form sex cells |
