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Williams Biology
Chapter 9 Study Guide
Term | Definition |
---|---|
cell cycle | the life cycle of a cell from its beginning until it divides |
mitosis | the process of dividing a cell's nucleus to make two identical nuclei |
cancer | a condition in which a cell grows without control and divides too much |
tumor | a ball of cells made from extra divisions of cancer cells |
testosterone | male sex hormone |
sperm | male sex cell |
egg | female sex cell |
gamete | human sex cell |
estrogen | female sex hormone |
zygote | a fertilized egg |
fertilization | when the sperm meets the egg |
ovary | organ that produces eggs |
tetses | organ that produces sperm |
human gestation period | 9 months |
gestation time | period of development of a mammal from fertilization until birth |
fetus | an embryo after eight weeks of development in the uterus |