monosomy
lacking one chromosome of a set; 2n - 1
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Monosomy
Monosomy is the state of having a single copy of a chromosome pair instead of the usual two copies found in diploid cells. Monosomy can be partial if a portion of the second chromosome copy is present.
Monosomy refers to a condition in which there is one chromosome is missing. It is abbreviated 2N - 1. For example, monosomy X is a condition in which cells have only one X chromosome.
Monosomy having only one copy of one of the chromosomes.
Monozygotic twins Two individuals derived from a single fertilised egg and therefore genetically identical.
Monosomy Possessing only one copy of a particular chromosome instead of the normal two copies.
See also: cell, chromosome, gene expression, trisomy
Morbid map A diagram showing the chromosomal location of genes associated with disease.
Monosom
to be filled
[New Search Form] Programming: Herbert Maier
Database: Birgid Schlindwein. Please contact me if you encounter any mistakes or if you are missing anything
© Dr. Birgid B. Schlindwein
last update of the database 10/01/2006 ...
The only known monosomy is monosomy X, it is also known as Turner Syndrome.
Cri-du-chat syndrome -- a chromosomal condition (monosomy 5p). Name comes from the distinctive mewing cry of affected infants; characterized by significant mental deficiency, low birthweight, failure to thrive and short stature; ...
Turner syndrome or Ullrich-Turner syndrome encompasses several chromosomal conditions, of which monosomy X is the most common. It occurs in about 1 out of every 2500 female births.[1] Some sources say 1 out of every 5000.
Usually refers to an absence (monosomy) or an extra copy (trisomy) of a single chromosome.
Related Terms:
Chromosome
The term was proposed by Waldeyer (1888) for the individual threads within a cell nucleus (gk. chroma, colour; soma, body).
Zygotes missing one chromosome ("monosomy") cannot develop to birth (except for females with a single X chromosome).
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.
Trisomy 21, exception leading to Downs syndrome
Sex chromosomes
Turner syndrome: monosomy X
Klinefelter syndrome: XXY
Translocation and deletion: transfer of a piece of one chromosome to another or loss of fragment of a chromosome.
Monosomy The total loss of one of a pair of chromosomes. This occurs, for example, in Turner Syndrome where one X chromosome is lost leaving a total of 45 chromosomes.
 See also: Chromosome, Chromosomes, Trisomy, Cells, Human
  
|
RSS
