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The “deteriorating” Y chromosome features new genes

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Human male karyotpe high resolution - Chromosome Y.png
human Y chromosome

From ScienceDaily:

Researchers from the Institute of Population Genetics at Vetmeduni Vienna, using a new and highly specific analysis method, could now provide fresh momentum to help decode the evolutionary dynamics of the Y chromosome. Their study shows that ten times more new genes are transferred onto the Y chromosome in fruit flies than had been previously thought. Some of these new genes even appear to have taken on important functions.

A special surprise for the research team was that four of the 25 newly transferred genes on the Y chromosome have already assumed an important function there. “As these new genes can be found in all individuals of a species, the question arises as to which functions these new Y-linked genes could have,” says Tobler. Until now, it has been still completely unclear if and how long these new genes can withstand the deterioration of the Y chromosome. As the new analysis method does not require a reference genome for the Y chromosome, it offers enormous potential to study the dynamics of new genes on the Y chromosome in many different species. “I expect many more exciting findings,” concludes Christian Schlötterer. Paper. (paywall) – Ray Tobler, Viola Nolte, Christian Schlötterer. High rate of translocation-based gene birth on theDrosophilaY chromosome. Proceedings of the National Academy of Sciences, 2017; 201706502 DOI: 10.1073/pnas.1706502114 More.

File under: The complete inadequacy of the Darwin-driven, gene-centric approach to evolution.

See also: Human and chimp Y chromosomes are very different

Y chromosome kept for “very specific reason,” “not random”

Y chromosome arose independently twice at same time, 180 mya


Junk DNA files: Genes on the Y chromosome a must for male survival (The Y chromosome had been reprieved earlier from its status as a vestige about to disappear, but this is newish)

Could it be that the main difference may not be in the chromosomes, but in the specific implementation of the designed system that uses the information stored in the chromosomes? Dionisio
"than had been previously thought" Haven't we heard that phrase before? :) Dionisio

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