Thursday, July 14, 2016
On the Celebration of Nettie Stevens, Who Discovered the Chromosomes “Y” and “X” and How They Define Gender
We will mention again here what Gilbert K. Chesterton warned: “There will come a time when we will have to prove that the leaves from the trees are green.” That moment has arrived!
NOTE: The geneticist Nettie Stevens, (Cavendish, Vermont, United States), July 7, 1861 – May 4, 1912 demonstrated that when a sperm with the large chromosome fertilized eggs, they produced female offspring (X), and when the sperm with the small chromosome fertilized eggs, they produced male offspring (Y). In the graphics it is illustrated – in human beings - the pair of sexual chromosomes of each gender