نتایج جستجو برای: dwarfism
تعداد نتایج: 11171 فیلتر نتایج به سال:
Gigantism and dwarfism evolve in vertebrates restricted to islands. We describe four new species in the Rhinolophus hildebrandtii species-complex of horseshoe bats, whose evolution has entailed adaptive shifts in body size. We postulate that vicissitudes of palaeoenvironments resulted in gigantism and dwarfism in habitat islands fragmented across eastern and southern Africa. Mitochondrial and n...
Taken as a whole, growth disorders attributed to various causes: (1) Lack o material, especially proteins; (2) distui neuro-hormonal regulation; (3) disorders bolism, e.g., in absorption in the intesti portation, assimilation or excretion; response of the end-organs, i.e., bone a plasm in general. In this complex syster functions the kidney plays a prominent pa it is not only the organ of elimi...
Taken as a whole, growth disorders attributed to various causes: (1) Lack o material, especially proteins; (2) distui neuro-hormonal regulation; (3) disorders bolism, e.g., in absorption in the intesti portation, assimilation or excretion; response of the end-organs, i.e., bone a plasm in general. In this complex syster functions the kidney plays a prominent pa it is not only the organ of elimi...
Small stature or growth retardation is a frequent problem in children, often leading to serious psychological repercussions. In some patients, as for instance in those with achondroplasia, severe hypothyroidism, or classical Turner's syndrome, the underlying disorder can easily be recognized. More often the growth retarded child presents no other symptoms, and the cause of dwarfism remains obsc...
The introduction of the Reduced height (Rht)-B1b and Rht-D1b semidwarfing genes led to impressive increases in wheat (Triticum aestivum) yields during the Green Revolution. The reduction in stem elongation in varieties containing these alleles is caused by a limited response to the phytohormone gibberellin (GA), resulting in improved resistance to stem lodging and yield benefits through an incr...
Historically, dwarfism was the major genetic defect in U.S. beef cattle. Aggressive culling and sire testing were used to minimize its prevalence; however, neither of these practices can eliminate a recessive genetic defect. We assembled a 4-generation pedigree to identify the mutation underlying dwarfism in American Angus cattle. An adaptation of the Elston-Steward algorithm was used to overco...
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