5 Written Questions
5 Matching Questions
- Stutter mutation
- Stop codon
- DNA mutation
- Template strand
- a 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.
- b The DNA strand that is used for assembly of mRNA by RNA polymerase using base-pairing rules. Complementary to the message sequence.
- c 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.
- d A change to the DNA structure altering the sequence of bases.
- e One of three triplet codes (UGA, UAG or UAA) that causes the termination of translation by the ribosome.
5 Multiple Choice Questions
- Genetic variation where there are distinct phenotypic categories. Usually controlled by one gene to a few genes. Examples include cystic fibrosis, shape of earlobes in humans and height in pea plants.
- Characteristic in which the allele responsible is only expressed in the phenotype if there is no dominant allele present.
- Variation of genetic information in a gene pool.
- Observable characteristics of an organism.
- Three types of RNA that form an important structural and functional role within the ribosome.
5 True/False Questions
Homeobox genes → Eukaryotic cell or organism that has two identical alleles for a specific gene.
Dominant → Characteristic in which the allele responsible is expressed in the phenotype even in those with heterozygous genotypes.
Polarity → Refers to the location of cells with respect to the head end (anterior) or tail end (posterior) of the body.
Protein → Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
Genetic code → Structure formed on the centromere that attaches the chromosomes to the spindle fibres during mitosis and meiosis.