Disappearance of the Human Y- Chromosome: The Impact of Genetic Drift and Mutation on Human Evolution

Bishal Kumar Bhuyan

Abstract: Sex determination in humans is primarily controlled by sex chromosomes, with males possessing an XY chromosome pair and females an XX pair. The Y chromosome, which plays a crucial role in initiating male development, has been undergoing progressive degeneration for millions of years. Over time, the Y chromosome has lost most of its genes, leading to speculation about its eventual disappearance. If this trend continues, alternative mechanisms, such as autosomal genes, may take over male - determining functions, as seen in some species. Evolutionary forces such as genetic drift, mutation and lack of recombination have contributed to the Y chromosome's decline. However, recent studies indicate that the Y chromosome has developed mechanisms to slow down its degeneration, potentially ensuring its survival. If the Y chromosome eventually disappears, human evolution may witness a shift in sex determination pathways, potentially leading to speciation.

Keywords: Y chromosome disappearance, genetic drift, mutation and evolution

How to Cite?: Bishal Kumar Bhuyan, "Disappearance of the Human Y- Chromosome: The Impact of Genetic Drift and Mutation on Human Evolution", Volume 14 Issue 2, February 2025, International Journal of Science and Research (IJSR), Pages: 1275-1276, https://www.ijsr.net/getabstract.php?paperid=SR25216095520, DOI: https://dx.doi.org/10.21275/SR25216095520