Glossary

AMPHIDS Paired openings in the nose of nematodes that act as smell and taste organs.

BIODEMOGRAPHY The study of age-specific mortality and fecundity rates and their biological determinants.

BIOGERONTOLOGY The study of biological processes that give rise to ageing.

CORPORA ALLATA Endocrine glands located in the head of insects.

DAUER LARVA A developmentally arrested, immature, long-lived and non-feeding form of Caenorhabditis elegans that forms under conditions of food scarcity and high population density, and that resumes development if food levels increase.

FORWARD GENETICS A genetic analysis that proceeds from phenotype to genotype: for example, by positional cloning or candidate-gene analysis.

INBREEDING DEPRESSION This occurs when deleterious, recessive alleles become homozygous in the progeny of matings between relatives, causing reduced fitness among these individuals.

PEROXIDATION A type of oxidation that involves the addition of oxygen to, for example, unsaturated fatty acids.

PLEIOTROPY The capacity of different alleles of a gene to affect more than one aspect of a phenotype.

PROTEIN CARBONYL A protein that contains oxygen that is linked by a double bond to carbon, resulting from protein oxidation.