| A | B |
| DNA | A compound in chromosomes that codes and stores genetic information and controls all cell activities. |
| Genetic code | Genetic code is based on arranging the four G, C, A & T chemical letters into organisms |
| Chromosome | A fat strand of DNA (deoxyribonucleic acid) covered with protein that carry genetic code |
| Gene | A segment along DNA strand that controls traits passed from parent to offspring and directs making of proteins. |
| Allele | An alternative form of a gene |
| Mitosis | A cell division that produces two cells identical to the parent cell. |
| Meiosis | A cell division that produces sex cell that have only half the normal number of chromosomes. |
| Traits | A most desirable characteristics |
| Purebred | Ancestors that have only produced white offspring. |
| Hybrid | Crossing two purebred parents that differ in a trait such as coat color. |
| Dominant trait | Black coat color in a cat, brown eye color for human. Letter is always capital for dominat trait. |
| Recessive trait | White fur coat in a cat, blue eye color for human. Letter is always small for recessive trait. |
| Incomplete dominance | A new color is produced |