5 Written questions
5 Matching questions
- Neutral mutation
- Genetic code
- a The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.
- b Eukaryotic cell or organism that has two identical alleles for a specific gene.
- c A mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.
- d Programmed 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.
- e Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
5 Multiple choice questions
- Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.
- The points where non-sister chromatids within a bivalent join, where they cross over.
- Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
- The formation of an RNA molecule, using a length of DNA as a template and catalysed by RNA polymerase.
- 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.
5 True/False questions
Template strand → The DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.
Homeotic selector genes → Genes that control the development of the body plan of an organism.
DNA mutation → 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.
Homeobox genes → Eukaryotic cell or organism that has two identical alleles for a specific gene.
Genome → Alleles present within cells of an individual, for a particular trait/characteristic.