In 1842, Karl Nageli first observed chromosomes in the nucleus of plant cells. In 1875, scientist Strasburger first observed thread-like structures during cell division. He is called the inventor of chromosomes. In 1888, scientist Walter Fleming named the thread-like structure of the nucleus as chromatin. In 1888, scientist Wilhelm Waldeyer named it chromosome for its color-carrying capacity. In 1902, scientists Sutton and Boveri described chromosomes as the containers and carriers of heredity. In 1921, scientist Theophilus Painter first published the number of human chromosomes.
