Dr. Shivani Sachdev Gour Discusses the Disappearance of the Y-Chromosome

About two years ago, a study was published revealing that in two rodent species — the Eastern European wolf and the spiny rats of Japan — the Y chromosome has disappeared. The research also indicated that these two rodent species have developed a new sex-determining mechanism in another chromosome, where the SRY gene, which typically determines male sex on the Y chromosome, has been relocated. Despite the disappearance of the Y chromosome in these species, males are still being produced because the sex-determining function has been transferred to another chromosome.

In humans, the Y-chromosome is about one-third the size of the X chromosome and contains around 100 genes. In comparison, the X chromosome, which is present in females, has about 900 genes. Over the years, approximately 90% of the genes on the Y chromosome have been lost, and now only about 55 genes remain. It is estimated that it will take another 10-11 million years for the Y chromosome to potentially lose all of its genes.


No comments:

Post a Comment

Happy Parents from Sudan Celebrate Their Newborn Baby at SCI IVF Hospital Delhi

Heartwarming Moment at SCI IVF Hospital ЁЯТХ Our happy parents from Sudan visited SCI IVF Hospital, Delhi, bringing a cake to celebrate the ar...