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5 Written questions

5 Matching questions

  1. Translation
  2. Homozygous
  3. Hox clusters
  4. Mutation
  5. Recessive
  1. a Stage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.
  2. b Structural change to genetic material - either to a gene or to a chromosome.
  3. c Eukaryotic cell or organism that has two identical alleles for a specific gene.
  4. d Characteristic in which the allele responsible is only expressed in the phenotype if there is no dominant allele present.
  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. Large polymer molecule made of many amino acids joined by peptide bonds.
  2. The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
  3. Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
  4. A substance that controls the pattern of tissue development. It is produced in a particular region of a developing organism. It diffuses to other cells, which then enter a specific developmental pathway.
  5. A sequence of three bases that codes for a single amino acid according to the genetic code.

5 True/False questions

  1. Paternal chromosomeMember of a pair of homologous chromosomes that originally came from the male gamete.


  2. Nonsense mutationA change in DNA sequence that introduces a premature stop codon within a DNA coding sequence.


  3. Genetic codeThe way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.


  4. DNA mutationA change to the DNA structure altering the sequence of bases.


  5. Neutral mutationA mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.


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