| A | B |
|---|
| sex linked traits | a trait that is determined by a gene carried on the X or Y chromosome. |
| polygenic traits | trait determined by many genes working together. Result is a wide variety of phenotypes. Height and skin color are examples of these traits. |
| multiple alleles | three or more forms of a gene that code for a single trait. Blood type alleles A,B & O is an example of this. |
| female chromosomes | XX |
| male chromosomes | XY |
| carrier | Person who has one recessive allele for a trait, but does not have the trait. |
| pedigree | A chart or "family tree" that tracks which members of a family have a particular trait. |
| karyotype | A picture of all the chromosomes in a cell arranged in pairs. |
| A & O | Types of blood that type A can receive |
| B & O | Types of blood that type B can receive. |
| A,B,AB, & O | Types of blood that type AB can receive |
| O | Types of blood that type O can receive |
| genotype for type A heterozygous | IAi |
| genotype for type B heterozygous | IBi |
| genotype for type AB | IAIB |
| genotype for type O | ii |
| genetic disorder | an abnormal condition that a person inherits through genes (DNA) or chromosomes. |
| mutation | A change in a gene or chromosome. |
| genotype for type A homozygous | IAIA |
| genotype for type B homozygous | IBIB |
