5 Written questions
5 Matching questions
- Hox clusters
- a Stage of protein/polypeptide synthesis in which the amino acids are assembled at ribosomes according to the genetic code.
- b Structural change to genetic material - either to a gene or to a chromosome.
- c Eukaryotic cell or organism that has two identical alleles for a specific gene.
- d Characteristic in which the allele responsible is only expressed in the phenotype if there is no dominant allele present.
- e Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
5 Multiple choice questions
- Large polymer molecule made of many amino acids joined by peptide bonds.
- The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
- Specialised sex cells. In many organisms the gametes are haploid and are produced by meiosis.
- 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.
- A sequence of three bases that codes for a single amino acid according to the genetic code.
5 True/False questions
Paternal chromosome → Member of a pair of homologous chromosomes that originally came from the male gamete.
Nonsense mutation → A change in DNA sequence that introduces a premature stop codon within a DNA coding sequence.
Genetic code → The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.
DNA mutation → A change to the DNA structure altering the sequence of bases.
Neutral mutation → A mutation that even though it may change a coding sequence exerts no harmful or beneficial effects.