5 Written questions
5 Matching questions
- Hox clusters
- Discontinuous variation
- Coding strand
- a The DNA strand encompassing a gene that carries the sequence identical to the message sequence.
- b Groups of homeobox genes. More complex organisms have more such groups, probably due to a mutation that duplicated them.
- c Small vesicle formed that breaks away from the cell membrane during apoptosis
- d 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.
- e Eukaryotic cell or organism that has two different alleles for a specific gene.
5 Multiple choice questions
- The triplet code recognised by the ribosome that signals the start point for translation. Almost invariably a methionine codon (ATG).
- Production of new organisms involving fusion of nuclei from male and female gametes, usually from unrelated individuals. Increases genetic variation in the population.
- The fundamental relationship between DNA, RNA and protein first outlined by Francis Crick in 1958.
- A length of DNA that codes for one (or more) polypeptides/proteins. Some may code for RNA or regulate other genes.
- Molecule (nucleotide derivative) found in all living cells and involved in energy transfer. When it is hydrolysed energy is released.
5 True/False questions
Genome → All the genetic information within an organism/cell.
Dominant → Characteristic in which the allele responsible is expressed in the phenotype even in those with heterozygous genotypes.
Allele → All the genetic information within an organism/cell.
Genotype → Observable characteristics of an organism.
Diploid → All the genetic information within an organism/cell.