In people with chronic myelogenous leukemia, the chromosomes in the blood cells swap sections with each other. A section of chromosome 9 switches places with a section of chromosome 22, creating an extra-short chromosome 22 and an extra-long chromosome 9.
Discovered on September 23, 1846, by John Couch Adams. Neptune was the first planet found by mathematical prediction rather than by observation. Unexpected changes in the orbit of Uranus led astronomers to deduce that its orbit was subject to gravitational perturbation by an unknown planet.
It was discovered on Sep 23, 1846. Neptune was the first mathematical prediction. It was a hard work of three people together, Urbain Le Verrier, a French mathematician, Johann Galle, a German astronomer and John Couch Adams, a British mathematician.