CONTINUITY AND VARIATION

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Across
  1. 3. Choosing parents to produce desired traits
  2. 4. Physical expression of genotype
  3. 7. Cell division producing gametes
  4. 9. Transmission of traits from parents to offspring
  5. 11. Offspring showing genetic similarities
  6. 12. Producing genetically identical organisms
  7. 15. Allele expressed only when two copies are present
  8. 16. Allele expressed even if only one copy is present
  9. 19. Example of continuous variation
  10. 20. Example of discontinuous variation
  11. 23. Having two different alleles
  12. 25. Trait that helps survival in environment
  13. 26. Unit of inheritance controlling a characteristic
  14. 27. Passing on genetic information from one generation to the next
  15. 28. Cell division for growth and repair
  16. 29. Structure containing genes
Down
  1. 1. Condition caused by abnormal genes
  2. 2. Variation with distinct categories, e.g. blood group
  3. 5. Sex cell carrying genetic information
  4. 6. Differences between individuals of the same species
  5. 8. Change in DNA sequence
  6. 10. Different forms of a gene
  7. 13. Having two identical alleles
  8. 14. Process where better adapted organisms survive and reproduce
  9. 17. Diagram showing inheritance of traits
  10. 18. Variation with a range of values, e.g. height
  11. 21. Molecule carrying genetic information
  12. 22. Cell formed when gametes fuse
  13. 24. Gradual change in species over time
  14. 26. Genetic makeup of an organism