5 Written questions
5 Matching questions
- Segmentation genes
- Stutter mutation
- Frameshift mutation
- a Eukaryotic cell or organism that has two different alleles for a specific gene.
- b Genes that control the development of polarity within a body segment during development.
- 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.
- d A change in the DNA within a gene involving the insertion or deletion of a number of bases that is not a multiple of three. This causes the downstream gene sequence to be scrambled because the correct reading frame is lost.
- e Term to describe the engulfing by macrophages of vesicles from cells that have undergone apoptosis.
5 Multiple choice questions
- 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.
- Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.
- Structure formed on the centromere that attaches the chromosomes to the spindle fibres during mitosis and meiosis.
- Genes that control the development of the body plan of an organism.
- Failure of members of a homologous pair of chromosomes, or of a pair of chromatids, to separate during nuclear division.
5 True/False questions
Polypeptide → Large polymer molecule made of many amino acids joined by peptide bonds.
Gametes → A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
transfer RNA → A 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.
Hox clusters → Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
Neutral mutation → A mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.