The Y chromosome, which determines whether a mammal will be a male rather then a female has been found being stable for the past 25 million years, according to new research
Compared to the larger X chromosome, the Y pales both in size and the amount of genes it contains .In the last few years, many geneticists predicted that the Y chromosome probably would be vanishing in 10 millions years for “very few expressed genes actually resided on the Y.” Such an idea led people to speculate if there would be males any more.
B the researchers worked with samples from 15 different mammals, as well as a chicken, which they included for comparison.
