5 Written Questions
5 Matching Questions
- Coding strand
- Homeotic selector genes
- Crossing over
- a A characteristic where both alleles contribute to the phenotype.
- b These direct the development of individual body segments. They are master genes that control other regulatory genes.
- c Where non-sister chromatids exchange alleles during prophase I of meiosis.
- d Eukaryotic cell or organism that has two different alleles for a specific gene.
- e The DNA strand encompassing a gene that carries the sequence identical to the message sequence.
5 Multiple Choice Questions
- Macromolecule that is a polymer of many amino acids joined by peptide bonds. May comprise more than one polypeptide chains.
- Genes that control the development of polarity within a body segment during development.
- Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
- A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
- The way in which the 64 possible base triplets map onto the 20 amino acids that are used in polypeptide chains.
5 True/False Questions
Discontinuous variation → A change in DNA sequence that introduces a premature stop codon within a DNA coding sequence.
Chiasmata → The points where non-sister chromatids within a bivalent join, where they cross over.
Polypeptide → Programmed cell death. An orderly process by which cells self-destruct in an orderly fashion after a certain number of cell divisions, or if they cannot repair DNA damage.
DNA mutation → 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.
Meiosis → Programmed cell death. An orderly process by which cells self-destruct in an orderly fashion after a certain number of cell divisions, or if they cannot repair DNA damage.