genetics vocabulary

3. A complex molecule containing the genetic information that makes up the chromosomes.
5. An organism that has two identical alleles for a trait
9. to repeat, to copy, or to duplicate
11. A trait that reappears in the second generation after disappearing in the first generation when parents with different traits are bred
13. Process of making changes in the DNA code of living organisms
15. A threadlike, gene-carrying structure found in the nucleus. Each chromosome consists of one very long DNA molecule and associated proteins.
16. DNA segments that serve as the key functional units in hereditary transmission.
17. genetic makeup of an organism
18. a genetic factor that blocks another genetic factor
20. Genetically modified organism made when DNA is removed from one organism and placed within the DNA of what can be a very different organism.
21. the transplantation of normal genes into cells in place of missing or defective ones in order to correct genetic disorders.

1. Making a genetically identical copy of DNA or of an organism.
2. An organism's physical appearance, or visible traits.
4. macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
6. Traits determined by the environment
7. A characteristic that is passed from parent to offspring.
8. Passing of traits from parents to offspring
10. likelihood that a particular event will occur
11. DNA produced by combining DNA from different sources
12. An organism that has two different alleles for a trait
14. Cell division that produces reproductive cells in sexually reproducing organisms
19. Different forms of a gene