| A | B |
|---|
| Punnett Square | tool to cross the genes of parents (the boxes) |
| A capital and lower case letter | HYBRID (always shows dominant trait) |
| Phenotype | What it LOOKS like |
| Only way to get recessive trait | TWO lower case letters |
| Male (baby boy) | X from egg and Y from sperm |
| Generations | Each level of a pedigree chart |
| Carrier | They can pass on trait but do not have it |
| Normal Male | XY |
| Infected male | The X has the trait |
| Traits are determined by | Genes |
| Boys inherit sex (X) linked diseases from | mother |
| Genotype | gene make up (2 LETTERS) |
