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5 Written questions

5 Matching questions

  1. Hox clusters
  2. Discontinuous variation
  3. Coding strand
  4. Bleb
  5. Heterozygous
  1. a The DNA strand encompassing a gene that carries the sequence identical to the message sequence.
  2. b Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
  3. c Small vesicle formed that breaks away from the cell membrane during apoptosis
  4. d Genetic variation where there are distinct phenotypic categories. Usually controlled by one gene to a few genes. Examples include cystic fibrosis, shape of earlobes in humans and height in pea plants.
  5. e Eukaryotic cell or organism that has two different alleles for a specific gene.

5 Multiple choice questions

  1. The triplet code recognised by the ribosome that signals the start point for translation. Almost invariably a methionine codon (ATG).
  2. Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
  3. The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
  4. A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
  5. Molecule (nucleotide derivative) found in all living cells and involved in energy transfer. When it is hydrolysed energy is released.

5 True/False questions

  1. GenomeAll the genetic information within an organism/cell.


  2. DominantCharacteristic in which the allele responsible is expressed in the phenotype even in those with heterozygous genotypes.


  3. AlleleAll the genetic information within an organism/cell.


  4. GenotypeObservable characteristics of an organism.


  5. DiploidAll the genetic information within an organism/cell.