5 Written Questions
5 Matching Questions
- Spindle fibres
- Paternal chromosome
- Frameshift mutation
- Homeotic selector genes
- a These direct the development of individual body segments. They are master genes that control other regulatory genes.
- b 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.
- c Member of a pair of homologous chromosomes that originally came from the male gamete.
- d Structure formed on the centromere that attaches the chromosomes to the spindle fibres during mitosis and meiosis.
- e Made of microtubules, these structures are responsible for providing the framework for segregation of the chromosomes during mitosis and meiosis.
5 Multiple Choice Questions
- Eukaryotic cell or organism that has two identical alleles for a specific gene.
- Eukaryotic cell or organism having only one set of chromosomes. Denoted by n.
- Pair of synapsed (joined) homologous chromosomes during prophase and metaphase of meiosis I.
- A term applied to the genetic code that describes the fact that more than one triplet code is used to code for all amino acids other than tryptophan and methionine.
- The formation of an RNA molecule, using a length of DNA as a template and catalysed by RNA polymerase.
5 True/False Questions
Gametes → A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
Template strand → The DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.
Stop codon → A stretch of DNA consisting of two or more genes that are transcribed together and coregulated.
Hayflick limit → Eukaryotic cell or organism having only one set of chromosomes. Denoted by n.
Diploid → Eukaryotic cell or organism having only one set of chromosomes. Denoted by n.