<prompt> Locus heterogeneity is a feature of which of the following?Familial adenomatous polyposisMENUOsteogenesis imperfectaAll of the above  <response>: TYPES OF HETEROGENEITY areA. Allelic Heterogeneity,B. Phenotypic Heterogeneity,C. Locus or Nonallelic Heterogeneity.Nonallelic or locus heterogeneity refers to the situation in which a similar disease phenotype results from mutations at different genetic loci. E.g Osteogenesis imperfecta, Albinism, Muscular dystrophy syndromes dystrophin, most common cause of mus dystrophy and has large gene size. 