Carl Erich Correns (September 10, 1864, in Munich - February 14, 1933) was a German botanist and geneticist, who is notable primarily for his independent discovery of the principles of heredity, and for his rediscovery of Gregor Mendel's earlier paper on that subject, which he achieved simultaneously but independent of the biologists Erich Tschermak von Seysenegg and Hugo de Vries. September 10 is the 253rd day of the year (254th in leap years). ... 1864 (MDCCCLXIV) was a leap year starting on Friday (see link for calendar) of the Gregorian calendar or a leap year starting on Sunday of the 12-day-slower Julian calendar. ... Munich and the Alps Munich (German: München (pronounced listen) is the capital of the German federal state of Bavaria. ... February 14 is the 45th day of the year in the Gregorian Calendar. ... 1933 (MCMXXXIII) was a common year starting on Sunday (link will take you to calendar). ... Botany is the scientific study of plant life. ... == A geneticist is a scientist who studies genes, or a physician who diagnoses, treats, and counsels patients with genetic disorders or syndromes. ... Heredity (the adjective is hereditary) is the transfer of characteristics from parent to offspring, either through their genes or through the social institution called inheritance (for example, a title of nobility is passed from individual to individual according to relevant customs and/or laws). ... Gregor Johann Mendel Gregor Johann Mendel (July 20, 1822 – January 6, 1884) was an Austrian monk who is often called the father of genetics for his study of the inheritance of traits in pea plants. ... Erich von Tschermak-Seysenegg (1871 – 1962) was an Austrian agronomist. ... Hugo Marie de Vries (16th February 1848-21st May 1935), a Dutch biologist, was one of three men - see also Carl Correns and Erich von Tschermak - who in 1900 rediscovered Gregor Mendels work on genetics. ...

Education

Correns studied botany at the University of Munich in 1885 and was encouraged while there by Carl Nageli, a botanist who Mendel corresponded with on the subject of his pea plant experiments. After completing his thesis, Correns became a tutor at the University of Tubringen and in 1913 he became the first director of the newly founded Kaiser Wilhelm Institut fur Biologie in Berlin-Dahlem. Munich and the Alps Munich (German: München (pronounced listen) is the capital of the German federal state of Bavaria. ... 1885 (MDCCCLXXXV) is a common year starting on Thursday. ...

Key experiments and findings

In 1892, while at the University of Tubringen, Correns began to experiment with trait inheritance in plants. He focused mainly on the hawkweed plant experiments that Mendel carried out, not being aware of the pea plant results. Correns published his first paper on January 25th, 1900, which cited both Charles Darwin and Mendel, though without fully recognising the relevance of genetics to Darwin's ideas. In Correns' paper, "G.Mendel's Law Concerning the Behavior of the Progeny of Racial Hybrids", he restated Mendel's results and his law of segregation and law of independent assortment. He undertook experiments with the four o'clock plant (Mirabilis jalapa) to investigate non-Mendelian inheritance in variegated plants. In 1909 he established this as the first conclusive example of extrachromosomal inheritance. Most of Correns' work went unpublished, and was destroyed in the Berlin bombings of 1945. 1892 (MDCCCXCII) was a leap year starting on Friday (see link for calendar). ... Genera Hieracium Pilosella Hawkweed refers to any species in the very large genus Hieracium and its segregate genus Pilosella, in the sunflower family (Asteraceae). ... January 25 is the 25th day of the year in the Gregorian Calendar. ... 1900 (MCM) is a common year starting on Monday. ... In his lifetime Charles Darwin gained international fame as an influential scientist examining controversial topics. ... Genetics (from the Greek genno γεννώ= give birth) is the science of genes, heredity, and the variation of organisms. ... 1945 (MCMXLV) was a common year starting on Monday (link will take you to calendar). ...

External links

• Article relating the work of Gregor Mendel