Genetics, DNA, and Chromosomes

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Across
  1. 6. mutation that has no effect on the organism
  2. 9. protein that DNA is wrapped around so that it can fit into the nucleus
  3. 12. Heritable changes in DNA
  4. 14. when the centromere is in the middle of the chromosome
  5. 15. having more than two complete sets of chromosomes
  6. 16. mutagens break this bond holding nucleotide bases together
  7. 18. x-rays and UV light are this kind of mutagen
  8. 19. pesticides, tobacco smoke, and environmental pollutants are this kind of mutagen
  9. 20. loss of all or part of a chromosome
Down
  1. 1. chemical or physical agents that cause changes in the DNA structure
  2. 2. reverses the direction of the chromosome
  3. 3. deoxyribonucleic acid
  4. 4. only one copy of a chromosome is present
  5. 5. produces an extra copy of part of a chromosome
  6. 7. three copies of a chromosome are present
  7. 8. mutations that change chromosome number
  8. 10. part of one chromosome breaks off and attaches to a different chromosome
  9. 11. made of sugar, phosphate, and base
  10. 13. where the microtubules connect in cell division
  11. 17. ends of the chromosomes