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Analysis Study Research Paper | Genetics | India | Volume 14 Issue 2, February 2025 | Rating: 4.5 / 10
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
Edition: Volume 14 Issue 2, February 2025,
Pages: 1275 - 1276