Café polyglotte sur le net (Language forum)
Vous souhaitez réagir à ce message ? Créez un compte en quelques clics ou connectez-vous pour continuer.

Scientists have sequenced the entire human Y chromosome for the first time,

Aller en bas

Scientists have sequenced the entire human Y chromosome for the first time, Empty Scientists have sequenced the entire human Y chromosome for the first time,

Message  MurielB Ven 1 Sep - 15:48

clic➜https://url3546.brief.science/ss/c/AWD9AEydda1BlzAIDIER2mTwbaXE41pAaTcgvE7E5f4kMnBFLggNw5nV9P2VHg9umZ_Gz6x3qojGXApvK0v9hA/3z8/6tjmI_b8QqmdmPT-sXdQLg/h4/cOasi7_0nsOfjcT1dlIZNKt7CnRPgwaxqoeobRHQOSE

Scientists have sequenced the entire human Y chromosome, responsible for male sexual characteristics, for the first time, according to a study published on 23 August 2023 in the journal Nature.
The prevalence of highly repetitive sequences within the human Y chromosome has prevented its complete assembly to date1 and led to its systematic omission from genomic analyses. Here we present de novo assemblies of 43 Y chromosomes spanning 182,900 years of human evolution and report considerable diversity in size and structure. Half of the male-specific euchromatic region is subject to large inversions with a greater than twofold higher recurrence rate compared with all other chromosomes2. Ampliconic sequences associated with these inversions show differing mutation rates that are sequence context dependent, and some ampliconic genes exhibit evidence for concerted evolution with the acquisition and purging of lineage-specific pseudogenes. The largest heterochromatic region in the human genome, Yq12, is composed of alternating repeat arrays that show extensive variation in the number, size and distribution, but retain a 1:1 copy-number ratio. Finally, our data suggest that the boundary between the recombining pseudoautosomal region 1 and the non-recombining portions of the X and Y chromosomes lies 500 kb away from the currently established1 boundary. The availability of fully sequence-resolved Y chromosomes from multiple individuals provides a unique opportunity for identifying new associations of traits with specific Y-chromosomal variants and garnering insights into the evolution and function of complex regions of the human genome.
Scientists have sequenced the entire human Y chromosome for the first time, E1cd3610

_________________
France Merci de me faire part des grosses fautes dans mes messages en langue étrangère (en Message Privé). Grâce à vos remarques, je pourrai m'améliorer  :-) 
Pour n'importe quelle  question =>muriel.bercez@gmail.com
Pour connaitre le mode d'emploi=>PRESENTATION
You Don't speak French              =>Gb,De, Esp, It 
MurielB
MurielB
Admin

Messages : 17605
Lieu : Calais
Langues : Français (Langue maternelle), Gb, De, It, Es, chinois

Revenir en haut Aller en bas

Revenir en haut

- Sujets similaires

 
Permission de ce forum:
Vous ne pouvez pas répondre aux sujets dans ce forum