| A | B |
|---|
| asexual reproduction | type of reproduciton needing only one parent |
| choromosome | threadlike structurein the nucleus of a cell that controls hereditary information |
| DNA | molecule found in chromosomes that contains hereditary information |
| dominant trait | trait that always shows itself in organisms |
| egg | female reproductive, or sex, cell |
| fertilization | union of a male reproductive cell and a female reproductive cel to form a zygote |
| gene | segment of DNA that contains one unit of hereditary information |
| genetic engineering | set of methods used to change an organism's DNA |
| heredity | the passing of genes and the traits they carry from parents to offspring |
| meiosis | cell division that produces sex cells |
| mitosis | nuclear cell division that tresults in two identical "daughter" cells with the same nubmer of chromosomes as the parent cell; a type of asexual reproduction |
| offspring | new organism prodced by living things |
| pedigree chart | diagram that shows the genetic history of an individual |
| Punnett square | chart that shows possible gene combinations |
| recessive trait | trait that is hidden when a dominant gene is present |
| sexual reproduciton | the creation of new offspring by the combining of genes from two parents |
| sperm | male reproductive, or sex, cell |
| trait | characteristic of an organism, often produced by heredity |
| zygote | cell formed by fertilization in sexual reproduction |
