Abstract Background Multinodular goitre (MNG) is a common disorder characterised by an enlargement of the thyroid, occurring as a compensatory response to hormonogenesis impairment.The incidence of MNG is dependent on sex (female:male ratio 5:1) and several reports have documented a genetic basis for the disease.Last year we mapped a MNG locus to c

In biparental systems, members of the same pair can vary substantially in the amount of parental care they provide to offspring.The extent of this asymmetry should depend on the relative costs and benefits of care.Individual variation in personality is likely to influence this trade-off, and hence is a promising candidate to explain differences in