Biology Review

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Across
  1. 5. Changes in DNA sequence that may alter genetic information.
  2. 7. Molecules that carry genetic information, single-stranded
  3. 9. The basic unit of DNA and RNA, made of sugar, phosphate, and a nitrogen base.
  4. 13. The stage of mitosis where chromosomes align in the center of the cell.
  5. 15. The phase of the cell cycle where a cell grows and duplicates its DNA before division.
  6. 17. Cell division that results in two genetically identical daughter cells.
  7. 19. The process of copying DNA into RNA.
  8. 23. A component of nucleotides that links sugars in the DNA/RNA backbone.
  9. 24. The first stage of mitosis where chromosomes condense and spindle fibers form.
  10. 25. crosses involving two traits.
  11. 28. A nitrogen base that pairs with thymine in DNA or uracil in RNA.
  12. 30. Bases: Building blocks of DNA and RNA; adenine, guanine, cytosine, thymine (DNA) or uracil (RNA).
  13. 31. Genetic crosses involving one trait
Down
  1. 1. Having two identical alleles for a particular gene.
  2. 2. A trait expressed only when two recessive alleles are present.
  3. 3. A nitrogen base that pairs with guanine in DNA and RNA.
  4. 4. Refers to base pairs in DNA or RNA that fit together (e.g., adenine with thymine, guanine with cytosine).
  5. 6. A nitrogen base that pairs with cytosine in DNA and RNA.
  6. 8. The stage of mitosis where sister chromatids separate and move to opposite poles.
  7. 10. Molecules that carry genetic information, double-stranded
  8. 11. Stage of interphase where the cell grows (G1) and prepares for mitosis (G2).
  9. 12. A nitrogen base found only in DNA that pairs with adenine.
  10. 14. Synthesis: The process of making proteins from genetic instructions in DNA via RNA.
  11. 16. The process of converting RNA into a protein.
  12. 18. Part of a nucleotide that forms the backbone of DNA or RNA.
  13. 20. The division of the cytoplasm into two daughter cells after mitosis.
  14. 21. Having two different alleles for a particular gene.
  15. 22. The final stage of mitosis where nuclei reform around separated chromosomes.
  16. 26. A trait that is expressed when at least one dominant allele is present.
  17. 27. Stage of interphase where the cell prepares for mitosis
  18. 29. Helix: The twisted ladder structure of DNA.