The Y chromosome is becoming more and more weak in newer generations, what exactly does this mean? Well, it seems eventually the Y chromosome will be a thing of the past.
A study poster back in 2011 really does a good job of putting both sides to this into perspective. You see, the Y chromosome has been degenerating rapidly, females in current times are left with normal X chromosomes whereas males are left with a normal X but shriveled Y. If this sort of degeneration continues in about 4.6m years the Y chromosome will all but disappear.
This happens because the genes on the Y chromosome cannot undergo genetic recombination. Eliminating gene-damaging mutations is not a thing. All of this aside, a study published in PLoS Genetics was able to sequence portions of the Y chromosomes of about 62 different men and were able to find that it is prone to large-scale rearrangement. This being something that allows gene amplification.
The study was also able to show that the Y chromosome in itself has DNA sequences that read the same forward as backward. This helps to prevent degradation, but that does not completely rule it out. These genes in themselves seem to have quite a few tactics up their sleeves for remaining as intact as they can for as long as they can.
Now, whether or not this chromosome disappears in humans eventually or not it does not mean that men will go extinct. There have been species to already lose their Y chromosomes and they still have male and female offspring. In cases like this, the part of this chromosome that determines genetic maleness has moved to a different chromosome.
While this is a bit complicated it is quite interesting. What do you think about all of this? While we don’t know for sure if the Y chromosome will end up disappearing it does seem as if it at some point will. This is something that has many debating and will continue to have many debating for years to come.
For more information on this quite interesting topic please feel free to check out the video below. I for one am not sure how I feel about all of this. I guess eventually we will know more but for now, we wait.