| A | B |
|---|
| heredity | passing of physical characteristics from parents to offspring |
| traits | different forms of a characteristic |
| genetics | the scientific study of heredity |
| Gregor Mendel | the “Father of genetics” |
| gene | factors that control a trait |
| allele | different forms of a gene |
| dominant allele | a trait always shows up when the allele is present |
| recessive allele | trait is hidden whenever the dominant allele is present |
| hydrid | an organism with two different alleles for a trait |
| phenotype | physical appearance of visible traits of an organism |
| genotype | genetic make-up or allele combinations of an organism |
| codominance | alleles are neither dominant nor recessive, as a result both alleles are expressed in the offspring |
| homozygous | an organism has two identical alleles for a trait |
| heterozygous | an organism has two different alleles for a trait |
| independence of events | what happened previously does not affect the outcome of the next event. |
| punnett square | a chart that shows all the possible combination of alleles that can result from a genetic cross |
