| A | B |
|---|
| asexual reproduction | all the genes passed on to the offspring come from a single parent |
| sexual reproduction | offspring genetically different from eith of the two parents |
| mitosis | cell's nucleus and cytoplasm divides into to produce two identical cells |
| meiosis | process that forms sex cells |
| recombination of genes | mixing of DNA from sperm and eggs to a unique new individual |
| Internal development | baby develops inside the female's body |
| External development | baby develops outside the female's body |
| Internal fertilization | egg and sperm unite inside the female's body |
| External fertilization | egg and sperm unite outside the female's body |
| testosterone | affects secondary sex development and reproduction in males |
| estrogen | affects secondary sex development and reproduction in females |
| progesterone | hormone associated the reproductive system |
| unique | one of a kind |
| cancer | uncontrolled division of cells |
| cancerous cell | a cell that reproduces and does not age and die |
| cloning | producing organisms genetically identical to the parent |
| fertilization | uniting of a sperm and an egg |
| gamete | sex cell (a sperm or egg) |
| placenta | where diffusion of nutrients and wastes between mother and embryo occurs |
| uterus | baby develops in this structure in placental mammals |
| placental mammal | a warm blooded, milk producing, haired, placental organism |
| sex cells | sperm or eggs |
