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5 Written questions

5 Matching questions

  1. Meiosis
  2. Hox clusters
  3. Phenotype
  4. Polyploid
  5. Stutter mutation
  1. a Observable characteristics of an organism.
  2. b Type of nuclear division. A reduction division. The chromosome number is halved. It involves two divisions. It produces cells that are genetically different from each other and from the parent cell.
  3. c Causes an expansion or contraction of a run of identical codons within a gene affecting the length of a run of identical amino acids in the polypeptide.
  4. d Eukaryotic organisms or cell with more than two sets of chromosomes.
  5. e Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.

5 Multiple choice questions

  1. An alternative version of a gene carrying sequence differences.
  2. The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
  3. Term to describe the engulfing by macrophages of vesicles from cells that have undergone apoptosis.
  4. A 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. Made of microtubules, these structures are responsible for providing the framework for segregation of the chromosomes during mitosis and meiosis.

5 True/False questions

  1. Ribosomal RNAA short length of about 100 RNA nucleotides that adopts a clover leaf structure and carries an amino acid to the ribosome to be incorporated into a growing polypeptide chain.

          

  2. Discontinuous variationA 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.

          

  3. ChiasmataType of nuclear division. A reduction division. The chromosome number is halved. It involves two divisions. It produces cells that are genetically different from each other and from the parent cell.

          

  4. DegenerateA term applied to the genetic code that describes the fact that more than one triplet code is used to code for all amino acids other than tryptophan and methionine.

          

  5. Non-disjunctionA change to the DNA structure altering the sequence of bases.

          

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