| A | B |
|---|
| chromosomes | structures in the nucleus of a cell that control the cell's activities |
| fertilization | the joining of a sperm cell and an egg cell |
| fertilized egg | the cell that results when an egg cell and a sperm cell unite |
| pollination | movement of pollen from a stamen to a pistil |
| inherited | passed to offspring from parents |
| gene | the section of a chromosome that controls a trait |
| recessive gene | a gene whose expression is hidden by a dominant gene |
| dominant gene | a gene that can prevent the expression of another gene |
| hybrid | an individual that has a dominant and a recessive gene for a trait |
| mutation | a permanent change in the structure of a gene or chromosome |
| selective breeding | breeding plants or animals with certain traits to produce offspring with those traits |
