Y- chromosome on the verge of extinction!


Understanding the extinction of Y-chromosome- Beginning of this end of human era






Importance of Y- chromosome 

The Y chromosome plays a crucial role in human reproduction, primarily responsible for determining male sex and initiating male development.



Key points of its role:-

Sex Determination: The Y chromosome contains the SRY gene, which is the master switch for male development. When present, it triggers the development of male reproductive organs, such as testes and prostate. 

Spermatogenesis: The Y chromosome also carries genes essential for sperm production. These genes help regulate the process of spermatogenesis, ensuring the development of healthy sperm.

Male Fertility: The presence of the Y chromosome is vital for male fertility. Mutations or deletions in certain regions of the Y chromosome can lead to infertility or reduced sperm quality.


In essence, the Y chromosome is a key factor in the biological pathway that leads to male development and reproductive function.  



After knowing the role of this chromosome, this creates a worrisome future for male generation in the world.

A recent study has highlighted the disappearance of Y- chromosome, leading to the possibility of only female child born in the world.


But a 2022 study published in journal “Proceedings of the National Academy of Science “, that a spiny rat has successfully evolved a new male determining gene , offering hope for humanity’s future.




Decline of the Y chromosome

Most mammals share a similar X and Y chromosome structure, but this system presents challenges due to the unequal gene dosage between males and females. Interestingly, Australia’s platypus possesses entirely different sex chromosomes, resembling those of birds, suggesting that the mammal X and Y chromosomes were once ordinary chromosomes.


Over the 166 million years since humans and platypuses diverged, the Y chromosome has lost a significant number of active genes, shrinking from 900 to just 55. If this trend continues, the Y chromosome could vanish entirely within the next 11 million years. ( Source: Business Standard)

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