| A | B |
|---|
| asexual reproduction | One parent; produces genetically identical offspring |
| cloning | Making identical genetic copies |
| differentiation | Cells that become different from one another |
| egg | Sex cell from the mother; provides half the genetic information |
| embryo | An organism in the early stages of development |
| fertilization | When a sperm and egg cell combine |
| fetus | After about two months, an embryo with all major organs formed |
| gamete | Sex cell; egg or sperm cell |
| gene expression | When a gene is actively producing its protein |
| meiosis | Cell division that produces sex cells with half the genetic material |
| mitosis | Cell's genetic material divides, creates two complete sets of genetic material |
| ovaries | Produce egg cells (female gametes), estrogen and progesterone |
| placenta | Organ responsible for the passage (by diffusion) of nutrients and oxygen from the mother's blood to the fetus |
| estrogen and progesterone | Female hormones associated with sexual development and the reproductive process |
| recombination | Genes from both parents recombine when fertilization occurs |
| sex cell | Also known as gametes; carry half of the genetic information from parent |
| sexual reproduction | Two parents; offspring have genetic information from both parents; not identical to parents |
| species | Closely related organisms; can create new individuals through reproduction |
| sperm | Sex cell from the father; provides half of the genetic information |
| testes | Organs that produce male sperm cells and testosterone |
| testosterone | Male hormone associated with male sexual development and reproduction |
| uterus | Where the embryo develops into the fetus |
| zygote | Gametes unite to form this cell that contains all of the genetic information needed to develop the offspring |
