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Turner syndrome (TS), commonly known as 45,X, or 45,XO, [note 1] is a chromosomal disorder in which cells have only one X chromosome or are partially missing an X chromosome (sex chromosome monosomy) leading to the complete or partial deletion of the pseudoautosomal regions (PAR1, PAR2) in the affected X chromosome.
Turner syndrome: X C Full genetic disorders list. Disorder Chromosome or gene Type Reference ... dominant/recessive [8] CRASIL syndrome: HTRA1: 1:156,000,000
Autosomal dominant Familial hypercholesterolemia: 1 in 500 [11] Myotonic dystrophy type 1: 1 in 2,100 [12] Neurofibromatosis type I: 1 in 2,500 [13] Hereditary spherocytosis: 1 in 5,000 Marfan syndrome: 1 in 4,000 [14] Huntington's disease: 1 in 15,000 [15] Autosomal recessive Sickle cell anaemia: 1 in 625 [16] Cystic fibrosis: 1 in 2,000 Tay ...
The existence of genes along the inactive X which are not silenced explains the defects in humans with atypical numbers of the X chromosome, such as Turner syndrome (X0, caused by SHOX gene [43]) or Klinefelter syndrome (XXY). Theoretically, X-inactivation should eliminate the differences in gene dosage between affected individuals and ...
Autosomal dominant and autosomal recessive inheritance, the two most common Mendelian inheritance patterns. An autosome is any chromosome other than a sex chromosome.. In genetics, dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome.
For a dominant trait to be displayed, an individual only requires one dominant allele, whereas expressing a recessive trait requires the possession of two recessive alleles at the same time. X-linked genetic disorders can arise when there is a spontaneous and permanent change in the DNA sequence of an X-linked gene, known as mutation .
Related: Gerry Turner and Theresa Nist's Relationship Timeline, from Golden Bachelor to Divorce "I am absolutely, 100% still looking for my person," he says with a smile. "If there is a message ...
About half of individuals with Turner syndrome have monosomy X (45,X), which means each cell in a woman's body has only one copy of the X chromosome instead of the usual two copies. Turner syndrome can also occur if one of the sex chromosomes is partially missing or rearranged rather than completely missing.