| A | B |
| mitosis | process by which body cells grow and divide every day. |
| chromosome | Structure in the cell's nucleus which holds the hereditary information. |
| fertilization | The joining of an egg and sperm. |
| genes | The sections of DNA that contain instructions for making specific proteins. |
| sperm | Male sex cells. |
| zygote | Cell formed when an egg and a sperm cell join. |
| mutation | Any permanet change in a gene or chromosome. |
| asexual | Type of reproduction that produces a new organism; with identical chromosomes to those of the parent organism. |
| meiosis | Process that produces haploid sex cells. |
| DNA | An organism grows and functions by following the information in this code. |
| eggs | Female sex cells. |
| diploid | Cells wth pairs of chromosomes are this. |
| sexual | Type of reproduction that requires the joining of two sex cells. |
| RNA | Type of nucleic acid that carries the infomation needed to make proteins. |
| haploid | Cells that do not have pairs of chromosomes (sex cells). |