| A | B |
|---|
| asexual reproduction | reproduction involving only one parent |
| extinct | the state of organisms of one kind when they no longer exist; describes a species of which every member has died |
| reproduction | the process of living things producing new living things of the same kind |
| budding | swelling in certain plants and animals that develops into a new individual of the same kind |
| clone | an organism genetically identical to its parent |
| fission | the method of reproduction in which the parent body divides to make two or more organisms of the same kind |
| vegetative reproduction | asexual reproduction in plants |
| chromosome | the strandlike material controlling all the cell’s activities; usually found in the nucleus of a cell |
| egg | the female reproductive cell |
| sperm | the male reproductive cell |
| trait | a characteristic passes from parent to offspring |
| fertilization | the joining of an egg cell with a sperm cell |
| gene | the section of a chromosome that passes on traits |
| embryo | a developing organism |
| gestation | the length of time from fertilization to birth |
| genetics | the scientific study of the passing of traits from parent to young |
| hybrid | an organism with two different genes for a particular trait |
| mutation | a change within the chromosome of an organism resulting in new features or traits in its offspring |
| Punnett square | a chart showing the possible combinations of genes that pass from parents to offspring |
| pure strain | an organism with only one gene type for a particular trait |
| dominant trait | a trait that is more powerful than any other trait of the same kind |
| recessive trait | a trait less powerful than another trait of the same kind |
