| A | B |
|---|
| Traits | An organism's physical characteristics |
| DNA molecule | Contains alleles |
| Alleles | Different forms of a gene |
| 23 | Number of chromosomes given by human to offspring |
| Asexual reproduction | Reproduction in which a cell doubles its contents and then divides into two identical cells |
| Phenotype | Physical appearance |
| Purebred | Both alleles for a trait are the same |
| Genotype | Genetic alleles for a characteristic |
| Heterozygous | Alleles for a trait are different |
| Adenine pairs with | Thymine |
| Cytosine pairs with | Guanine |
| Recessive allele | Trait hides if dominant allele is present |
| Dominant allele | Trait shows if this allele is present |
| Tt, Tt, tt, tt | Genotype 50% Tt and 50% tt |
| TT, Tt, Tt, tt | Phenotype 75% Tall and 25% short |
| Heterozygous Tall | Tt |
| Homozygous Tall | TT |
| Short | tt |
| Hybrid Tall | Tt |
| Purebred Tall and Purebred short | TT, tt |
| Homozygous recessive | Genotype is tt |
| Homozygous | Same allele |
| 3 parts of DNA | Sugar, Phosphate, nitrogen base |
| Inherited traits | Are dominant or recessive |
| Photosynthesis | Water+Carbon Dioxide+Sunlight=Glucose+Oxygen |
| Parts of a System | Cells make Tissues make Organs make an Organism |
