Decline of the Y Chromosome: The existence of boys on earth is in danger. In the coming times, men will become extinct from the earth. This is not us saying this but it has come to light in a recent research. Research has revealed that there has been a significant decrease in the Y Chromosome, which helps in the birth of boys. This has affected the human reproductive system a lot. According to a recent research, the extinction of the Y chromosome has come to light. The Y chromosome plays an important role in determining the gender of a man. If this research is to be believed, then in the future more girls will be born because the Y chromosome has reached the verge of extinction. If this continues, then in the coming years, the Y chromosome may completely disappear in the next 11 million years.
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Let us tell you that mammals, that is, those who feed their children milk, i.e. women or female animals have 2 X chromosomes. Whereas males have one X and one Y chromosome. When there is a fusion between the egg and sperm, then the SRY gene is formed. After this, the embryo is male.
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The SRY gene becomes active after about 12 weeks of pregnancy. By looking at it, we can find out whether the baby growing in the fetus is a male or a female. The child who produces the male hormone testosterone is born as a male.
Genetics expert Professor Jenny Graves said the reduction in size of the Y chromosome is not a new phenomenon. She explains that in the platypus, the XY chromosome pair looks like a normal chromosome with equal members. This suggests that the mammalian X and Y were a normal pair of chromosomes until very early on, Graves said. In two rodent lineages – the mole vole of eastern Europe and the spiny rat of Japan – the Y chromosome had already been lost. In these species, both males and females retain the X chromosome, but the Y chromosome and the SRY gene have disappeared.
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New sex-determining gene Professor Graves believes that there is a possibility of a new sex-determining gene developing in humans. However, this is not easy. The development of a new sex-determining gene can also pose many dangers. It is also possible that different types of sex-determining genes can develop in different parts of the world. If this happens, then after 110 million years, either there will be no humans left on earth or many different types of humans will be found.
Professor Jenny Graves, an expert in genetics.
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The SRY gene was discovered in 1990
The SRY gene was discovered in 1990. During this time it was found that it activates SOX9, which triggers the development of male gender in any mammals. That is, if this gene is present then the child growing in the womb is male. Why is the Y chromosome disappearing? In the 166 million years since humans and platypus separated, the Y chromosome has lost a significant number of active genes, which has decreased from 900 to only 55. This is a loss of about five genes every million years. If this continues, then in the coming years the Y chromosome may disappear completely in the next 11 million years.
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The X chromosome has 900 genes while the Y has about 55 genes
The X chromosome contains about 900 genes with multiple functions, while the Y contains about 55 genes. Only 27 of these are male-specific. Most of the Y is made up of repetitive ‘junk DNA’. With such an unstable structure, the Y chromosome is at risk of disappearing completely over the course of several generations, according to a report in The Week.
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