Year 8 Genetics and evolution

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Across
  1. 3. Alterations in surroundings that can affect survival and evolution
  2. 6. The physical characteristics expressed by an organism
  3. 8. The process of choosing organisms with desired traits to reproduce
  4. 9. Differences between individuals of the same species
  5. 11. The process by which genetic information is passed from parents to offspring
  6. 13. A group of organisms that can interbreed and produce fertile offspring
  7. 15. A structure made of DNA found in the nucleus of cells
  8. 17. A feature that helps an organism survive in its environment
  9. 18. When a species no longer exists
  10. 19. An allele that shows its effect even if only one copy is present
Down
  1. 1. The process where organisms better adapted to their environment survive and reproduce
  2. 2. The preserved remains or traces of ancient organisms
  3. 3. The gradual change in species over time
  4. 4. An allele that only shows its effect when two copies are present
  5. 5. The scientist who proposed the theory of evolution by natural selection
  6. 7. The genetic makeup of an organism
  7. 10. Different versions of the same gene
  8. 12. A section of DNA that codes for a specific characteristic
  9. 14. The molecule that carries genetic information in living organisms
  10. 16. A change in the DNA sequence of an organism