Across
- 2. helix a spiral staircase
- 6. drift the change in frequency of an allele
- 7. carries genetic information
- 9. the genetic makeup of an organism
- 11. a gene location with two different alleles
- 14. the passing of characteristics to offspring
- 16. one of two identical strands of a chromosome
- 18. a genetic change that helps an organism survive
- 22. alternative forms of a gene
- 23. another word for characteristic
- 24. the process when mRNA is synthesized
- 26. preserved remains of organisms from the past
- 27. type of cell division that results in producing gametes
- 28. a series of 3 nucleotides located on mRNA
Down
- 1. determines a trait
- 2. the allele that is expressed
- 3. identical alleles on homologous chromosomes
- 4. a protein that destroys toxins
- 5. carries instructions from the nucleus for protein synthesis
- 7. the process of making another copy of DNA
- 8. not able to be seen or noticed
- 10. isolation one population was physically separated into two
- 12. structure part of a body that no longer has a function
- 13. the rapid spread of a disease to a large number of people
- 15. cells that have half the usual number of chromosomes
- 17. the allele that is masked if it is paired with a dominant one
- 19. selection survival of the fittest
- 20. observable characteristics that are a result of an individuals genes
- 21. when a new species develops as a result of evolution
- 25. system cells that work together to protect the body