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5 Written Questions

5 Matching Questions

  1. Coding strand
  2. Codominant
  3. Homeotic selector genes
  4. Crossing over
  5. Heterozygous
  1. a A characteristic where both alleles contribute to the phenotype.
  2. b These direct the development of individual body segments. They are master genes that control other regulatory genes.
  3. c Where non-sister chromatids exchange alleles during prophase I of meiosis.
  4. d Eukaryotic cell or organism that has two different alleles for a specific gene.
  5. e The DNA strand encompassing a gene that carries the sequence identical to the message sequence.

5 Multiple Choice Questions

  1. Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
  2. Genes that control the development of polarity within a body segment during development.
  3. Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
  4. A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
  5. The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.

5 True/False Questions

  1. Discontinuous variationA change in DNA sequence that introduces a premature stop codon within a DNA coding sequence.

          

  2. ChiasmataThe points where non-sister chromatids within a bivalent join, where they cross over.

          

  3. PolypeptideProgrammed cell death. An orderly process by which cells self-destruct in an orderly fashion after a certain number of cell divisions, or if they cannot repair DNA damage.

          

  4. DNA mutationA change in DNA sequence within a gene that does not lead to a change in the amino acid sequence due to the degeneracy of the genetic code.

          

  5. MeiosisProgrammed cell death. An orderly process by which cells self-destruct in an orderly fashion after a certain number of cell divisions, or if they cannot repair DNA damage.

          

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