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.
Neptune cannot be seen without a large telescope and was first seen in 1846 from the observatory in Berlin. BUT, the existence of Neptune had actually been âdiscoveredâ a year earlier, in 1845. Neptune is the 8th planet from the Sun. Uranus, the 7th planet, was first discovered by means of a telescope in 1781.