5 Written Questions
5 Matching Questions
- Crossing over
- Homeobox genes
- a Eukaryotic organisms or cell with more than two sets of chromosomes.
- b Gene that can undergo mutations to become an oncogene, which induces tumour formation (cancer).
- c Where non-sister chromatids exchange alleles during prophase I of meiosis.
- d Genes that control the development of the body plan of an organism.
- e Having two sets of chromosomes (eukaryotic cell or organism). Denoted by 2n.
5 Multiple Choice Questions
- 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.
- All the genetic information within an organism/cell.
- A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
- Structure formed on the centromere that attaches the chromosomes to the spindle fibres during mitosis and meiosis.
- Eukaryotic cell or organism that has two different alleles for a specific gene.
5 True/False Questions
Paternal chromosome → The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
Haploid → Eukaryotic cell or organism having only one set of chromosomes. Denoted by n.
Hox clusters → Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
Frameshift mutation → 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.
Locus → Specific position on a chromosome, occupied by a specific gene.