Genetics and Evolution

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Across
  1. 4. having two different alleles for a trait
  2. 5. pair of complementary nitrogenous bases in a DNA molecule
  3. 6. when there are three or more alleles for a trait
  4. 7. two part scientific name that includes genus and species
  5. 9. trisomy 21
  6. 12. one allele is not completely dominant over the other
  7. 13. branching diagram the represents the evolutionary history of a group of organisms
  8. 19. having two identical alleles for a trait
  9. 22. reproductive cells, created by meiosis
  10. 23. key used to identify organisms
  11. 26. cell division that creates gametes for sexual reproduction
  12. 27. making a copy of DNA
  13. 28. two alleles are equally dominant
Down
  1. 1. different structure, similar function
  2. 2. three letter sequence of mRNA that codes for an amino acid
  3. 3. survival of the fittest
  4. 8. strand of DNA whose sequence can base pair with the sequences found in another DNA strand
  5. 10. carries DNA's message from the nucleus to the ribosome
  6. 11. variations of a gene
  7. 13. physical expression of a genotype
  8. 14. sequence of DNA that codes for a protein and, thus, determines a trait
  9. 15. brings amino acids to the ribosome
  10. 16. process in which homologous chromosomes exchange portions of their DNA during meiosis
  11. 17. similar structures, different functions
  12. 18. the process of using the DNA sequence to build a complementary mRNA sequence
  13. 19. a set of two chromosomes, one from each parent, with similar structures and genes
  14. 20. genetic makeup or allele combination for an organism
  15. 21. a gene found on the X chromosome
  16. 24. the process in which a ribosome reads a sequence of mRNA and uses it to create a protein
  17. 25. trait controlled by multiple genes; leads to a range of phenotypes