SNPs (Single Nucleotide Polymorphism)0 (Better Explained)

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A Single Nucleotide Polymorphism (SNP, pronounced snip; plural snips) is a DNA sequence variation occurring commonly within a population (e.g. 1%) in which a Single Nucleotide — A, T, C or G — in the genome (or other shared sequence) differs between members of a biological species or paired chromosomes. For example, two sequenced DNA fragments from different individuals, AAGCCTA to AAGCTTA, contain a difference in a single nucleotide. In this case we say that there are two alleles. Almost all common SNPs have only two alleles. The genomic distribution of SNPs is not homogenous; SNPs occur in non-coding regions more frequently than in coding regions or, in general, where natural selection is acting and fixating the allele of the SNP that constitutes the most favorable genetic adaptation. Other factors, like genetic recombination and mutation rate, can also determine SNP density.
SNP density can be predicted by the presence of microsatellites: AT microsatellites in particular are potent predictors of SNP density, with long (AT)(n) repeat tracts tending to be found in regions of significantly reduced SNP density and low GC content.

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dna Microsattelite,
Repetitive Dna,
Minisattelite Dna,
Dna Fingerprinting,
Simple Sequence Length Polymorphism,
Snp Simple Sequence Repeats,
Single Nucleotide Polymorphism,
Inter Simple Sequence Repeat,
DNA SNPs,
polimorfismo de un solo nucleotido,
Haplotipos de SNPs,
haplotipes snps,
alleles snp,
alleles single nucleotides polymorphism,

[Cj-luvs-u]

This is super helpful. We were talking about this in Science and I didn't fully understand what SNPs were. This is like the only simple video I could find so I could understand.

[martinvargasnieto]

Los polimorfismos únicos de nucleótidos (SNP)son variaciones en la secuencia del DNA que ocurren cuando un solo nucleòtido es diferente en al menos en 1% de la población. Cuando se presentan dentro de un gen crean diferentes variables o alelos de ese gen a diferencia de las porciones repetidas del DNA, es la secuencia por si misma que es útil para la ciencia forense. Los SNP son comunes y ocurren en 100 a 300 bases en toda la longitud de las mutaciones del genoma humanos. Las mutaciones en las (SNP) son raros por lo que las secuencias tienden a pasar sin cambios través de generaciones.

[baburali]

make one on Simple Sequence Repeats and Restriction Fragment Length Polymorphisms

[aventadorofficial]

Hi, I have a question, is that possible if some one with different haplogroup for example haplogroup O has same SNPs with some one else with haplogroup j1 ?

[dextrosefather]

Why is there true crime music in the bg

[anuragj.]

Can you text the last sentence? Please.

[jackgray]

I hate the abbreviation
Makes me think about teh Scottish national party fr

[AnnaleeBergin-cn]

Thomas Thomas Rodriguez Michelle Wilson Mary