| A | B |
|---|
| Pedigree | a graphic representation of genetic inheritance. |
| Carrier | a heterozygous individual |
| Heterozygous | Tt different alleles for a trait |
| Homozygous | TT same alleles for a trait |
| Circles in Pedigrees | Represent Females |
| Squares in Pedigrees | Represents Males |
| Shades Squares or Circles | Represent shows traits being studied |
| Horizontal Rows between Squares and Circles | Designate a generation |
| Solid horizontal line between circle and square | Marriage Line |
| Vertical line off of marriage line | Shows offsprings |
| Siblings | extend from marriage line |
| Mates of children | shown with a marriage line |
| Recessive trait | Recessive allele must come from both parents. |
| Simple Dominant Heredity | Dominate allele is present from one parent. |
| Incomplete Dominance | Neither allele is dominant but combine to show a new trait. |
| Codominant Allele | both alleles are expressed equally. |
| Multiple Alleles | Traits are controlled by more than two alleles. |
| Autosomes | 22 pairs of homologous chromosomes. |
| Sex Chromosomes | Make up the 23rd pair; XX female, XY male |
| Sex-Linked Traits | Traits controlled by genes on the sex chromosomes. |
| Polygeneic Inheritance | Inheritance is controlled by two or more genes. |
| Poly | Prefix for many |
| Co | Prefix for with |
| In | Prefix for not |
| Homo | Prefix for same |
| Hetero | Prefix for different |
