| A | B |
|---|
| homozygous | contains two of the same alleles for the same gene |
| heterozygous | contains two different alleles for the same gene |
| Punnett square | used to predict the gentypes of offspring from a cross |
| genotype | two letter representation of an organism's alleles for a trait or gene |
| phenotype | the physical appearance of an organism |
| allele | alternative form of a gene |
| gene | segment of DNA that provides instructions for the production of a protein |
| karyotype | representation of an organism's chromosomes |
