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Encyclopedia > DYS (DNA)

DYS is short for DNA Y-chromosome Segment, and is used to designate a segment of DNA on the Y chromosome where a sequence of nucleotides repeats. These sequences are known as short tandem repeats (STRs), and are called markers in genealogical DNA testing. The possible variations of repeats at a DYS marker are known as alleles. DNA - Wikipedia, the free encyclopedia /**/ @import /skins-1. ... The human Y chromosome is one of two sex chromosomes, it contains the genes that cause testis development, thus determining maleness. ... A nucleotide is a monomer or the structural unit of nucleotide chains forming nucleic acids as RNA and DNA. A nucleotide consists of a heterocyclic nucleobase, a pentose sugar, and a phosphate or polyphosphate group. ... The short tandem repeats (STR) are tandemly repeated DNA sequences of a pattern of length from 2 to 10 bp (for example (CA)n(TG)n in a genomics region) and the total size is lower than 100 bp. ... A genealogical DNA test involves examining the nucleotides at specific locations on a persons DNA. The test results have no medical value and cannot determine genetic diseases or disorders; they are only used for genetic genealogy. ... An allele is any one of a number of alternative forms of the same gene occupying a given locus (position) on a chromosome. ...


DYS is often proceeded by the number sign (#), so the location 455 may be written as DYS455, DYS 455, DYS#455, or DYS# 455. Number sign is the Unicode preferred name for the glyph or symbol #. The name was chosen from several used in the United States and Canada. ...


See also


  Results from FactBites:
 
DYS (DNA) - Wikipedia, the free encyclopedia (112 words)
DYS is short for DNA Y-chromosome Segment, and is used to designate a segment of DNA on the Y chromosome where a sequence of nucleotides repeats.
The possible variations of repeats at a DYS marker are known as alleles.
DYS is often proceeded by the number sign (#), so the location 455 may be written as DYS455, DYS 455, DYS#455, or DYS# 455.
Genealogical DNA test - Wikipedia, the free encyclopedia (1824 words)
The DNA in the mitochondria (an organelle inside most cells) is generally passed down by the mother unchanged, though some exceptions have been shown.
Genealogical DNA tests allow for an individual to determine with 99.9% certainty that they are related to another individual within a certain time frame, or with 100% certainty that they are not related to another individual within a certain time frame.
Though genealogical DNA tests results generally have no informative medical value and do not determine genetic diseases or disorders, there has been a correlation established between a lack of DYS464 markers and infertility, and a correlation between mtDNA haplogroup H and protection from sepsis.
  More results at FactBites »

 
 

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