title: Fitness.
authors.affiliation: Institute of Genetics, University of Nottingham, Queens Medical Centre, NG7 2UH, Nottingham, UK.
authors.forename: John
authors.initials: J
authors.lastname: Brookfield
mesh_terms: D000222:Adaptation, Physiological; D005075:Biological Evolution; D005260:Female; D005838:Genotype; D006801:Humans; D008297:Male; D012641:Selection, Genetic