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Roberts syndrome, or sometimes called pseudothalidomide syndrome, is an extremely rare autosomal recessive genetic disorder that is characterized by mild to severe prenatal retardation or disruption of cell division, leading to malformation of the bones in the skull, face, arms, and legs.
In most of the families reported so far, tetra-amelia syndrome appears to have an autosomal recessive pattern of inheritance. [ 1 ] [ 2 ] This means the defective gene responsible for the disorder is located on an autosome , and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder.
Situs inversus has an autosomal recessive pattern of inheritance. Situs inversus is generally an autosomal recessive genetic condition, although it can be X-linked or found in identical "mirror image" twins. [4] About 25% of individuals with situs inversus have an underlying condition known as primary ciliary dyskinesia (PCD).
Autosomal genetic disorders which exhibit Mendelian inheritance can be inherited either in an autosomal dominant or recessive fashion. [7] These disorders manifest in and are passed on by either sex with equal frequency. [7] [8] Autosomal dominant disorders are often present in both parent and child, as the child needs to inherit only one copy ...
A. Abdallat–Davis–Farrage syndrome; Abetalipoproteinemia; Absent tibia-polydactyly-arachnoid cyst syndrome; Acanthosis nigricans-muscle cramps-acral enlargement syndrome
An autosomal recessive disorder of sex development, described as pseudovaginal perineoscrotal hypospadias (PPSH), was discovered in males in 1961. [37] The main feature of this syndrome was a vulva with the presence of bilateral testes and male urogenital tracts in which the ejaculatory ducts terminate in a blind-ending vagina. [3]
Laron syndrome (LS), also known as growth hormone insensitivity or growth hormone receptor deficiency (GHRD), is an autosomal recessive disorder characterized by a lack of insulin-like growth factor 1 (IGF-1; somatomedin-C) production in response to growth hormone (GH; hGH; somatotropin). [6]
Most of these disorders involve excessive or deficient production of hormones such as glucocorticoids, mineralocorticoids, or sex steroids, [4] [2] and can alter development of primary or secondary sex characteristics in some affected infants, children, or adults. [5] It is one of the most common autosomal recessive disorders in humans. [6] [7] [8]