Chapter 15: Change Over Time

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Across
  1. 10. Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
  2. 11. Change over time; the process by which modern organisms have descended from ancient organisms
  3. 13. A group of similar organisms that can mate with each other and produce offspring that can also mate and reproduce
  4. 15. The process by which organisms that are best adapted to their environment are most likely to survive and reproduce
  5. 16. The transfer of a gene from the DNA of one organism into another organism, in order to produce an organism with desired traits
Down
  1. 1. The process of changing a gene to treat a medical disease or disorder; an absent or faulty gene is replaced by a normal working gene
  2. 2. Any difference between individuals of the same species
  3. 3. Similar structures that related species have inherited from a common ancestor
  4. 4. Pattern of evolution characterized by the slow and steady accumulation of small genetic changes over long periods of time
  5. 5. A selective breeding method that involves crossing different individuals to bring together the best traits from both parents
  6. 6. A selective breeding method in which two individuals with similar sets of alleles are crossed
  7. 7. An organism that is genetically identical to the organism from which it was produced
  8. 8. A well-tested explanation for a wide range of observations or experimental results
  9. 9. A trait that increases an organism's ability to survive and reproduce
  10. 12. The preserved remains or traces of an organism that lived in the past
  11. 14. Method of breeding that allows only those organisms with desired traits to produce the next generation