| A | B |
| Allele for brown eyes. | Dominant gene for eye color. |
| Allele for blue eyes. | Recessive gene for eye color. |
| Allele for tall pea plants. | Dominant gene for pea height. |
| Allele for short pea plants. | Recessive gene for pea height. |
| Allele for wrinkled seeds. | Recessive gene for seed shape. |
| Allele for smooth seeds. | Dominant gene for seed shape. |
| Allele for black fur. | Dominant gene for fur color. |
| Allele for white fur. | Recessive gene for fur color. |
| Allele for curly hair. | Dominant gene for hair style. |
| Allele for straight hair. | Recessive gene for hair style. |