Image from his textbook "The cell in Development and Inheritance", second edition, 1900. Events 202 BCE - The Battle of Zama results in the defeat of Carthage and Hannibal. Year 1856 ( MDCCCLVI) was a Leap year starting on Tuesday (link will display the full calendar of the Gregorian Calendar (or a Leap year Geneva is a suburb of Chicago located in extreme eastern Kane County Illinois. The State of Illinois ( roughly ill-i-NOY is a state of the United States of America, the 21st to be admitted to the Union. Events 1284 - Statute of Rhuddlan incorporated the Principality of Wales into England 1575 - Indian Year 1939 ( MCMXXXIX) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar. Zoology (from Greek ζῷον, zoon, "animal" + λόγος, " Logos " "knowledge" is the branch of Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is Williams College is a highly selective private liberal arts college located in Williamstown, Massachusetts. Bryn Mawr College ( brin-mar is a highly selective women's liberal arts college located in Bryn Mawr, a community in Lower Merion Columbia University is a private University in the United States and a member of the Ivy League. The XY sex-determination system is the Sex-determination system found in Humans most other Mammals some insects ( Drosophila) and some

Edmund Beecher Wilson (October 19, 1856 – March 3, 1939) was a pioneering American zoologist and geneticist. Events 202 BCE - The Battle of Zama results in the defeat of Carthage and Hannibal. Year 1856 ( MDCCCLVI) was a Leap year starting on Tuesday (link will display the full calendar of the Gregorian Calendar (or a Leap year Events 1284 - Statute of Rhuddlan incorporated the Principality of Wales into England 1575 - Indian Year 1939 ( MCMXXXIX) was a Common year starting on Sunday (link will display the full calendar of the Gregorian calendar. The United States of America —commonly referred to as the Zoology (from Greek ζῷον, zoon, "animal" + λόγος, " Logos " "knowledge" is the branch of A geneticist is a scientist who studies Genetics, the science of Heredity and variation of Organisms A geneticist can be employed as a researcher

Wilson was born in Geneva, Illinois, and graduated from Yale in 1878. Geneva is a suburb of Chicago located in extreme eastern Kane County Illinois. The State of Illinois ( roughly ill-i-NOY is a state of the United States of America, the 21st to be admitted to the Union. Year 1878 ( MDCCCLXXVIII) was a Common year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Common He earned his doctorate at Johns Hopkins in 1881. A doctorate is an Academic degree that indicates the highest level of academic achievement

He was a lecturer at Williams College in 1883-84 and at the Massachusetts Institute of Technology in 1884-85. Williams College is a highly selective private liberal arts college located in Williamstown, Massachusetts. Year 1883 ( MDCCCLXXXIII) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Common Year 1884 ( MDCCCLXXXIV) was a Leap year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Leap year Year 1884 ( MDCCCLXXXIV) was a Leap year starting on Tuesday (link will display the full calendar of the Gregorian calendar (or a Leap year Year 1885 ( MDCCCLXXXV) was a Common year starting on Thursday (link will display the full calendar of the Gregorian calendar (or a Common He served as professor of biology at Bryn Mawr College from 1885 to 1891. The meaning of the word professor ( Latin: professor, person who professes to be an expert in some art or science teacher of highest rank) varies Foundations of modern biology There are five unifying principles Bryn Mawr College ( brin-mar is a highly selective women's liberal arts college located in Bryn Mawr, a community in Lower Merion

He spent the balance of his career at Columbia University where he was successively adjunct professor of biology (1891-94), professor of invertebrate zoology (1894 - 1897), and professor of zoology (from 1897). Columbia University is a private University in the United States and a member of the Ivy League. Year 1891 ( MDCCCXCI) was a Common year starting on Thursday (link will display the full calendar of the Gregorian calendar (or a Common Year 1894 ( MDCCCXCIV) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Common An invertebrate is an Animal lacking a Vertebral column. The group includes 98% of all animal Species — all animals except those in the Chordate

Wilson is credited as America's first cell biologist. See also List of basic cell biology topics. Cell biology (also called cellular biology or formerly cytology, from the In 1898 he used the similarity in embryos to describe phylogenetic relationships. An embryo (from Greek:, plural, lit "that which grows" from en- "in" + bryein "to swell be full" is a multicellular By observing spiral cleavage in molluscs, flatworms and annelids he concluded that the same organs came from the same group of cells and concluded that all these organisms must have a common ancestor. Molluscs are animals belonging to the phylum Mollusca. There are around 250000 extant Species within the phylum with an estimated 70000 The flatworms (Phylum Platyhelminthes from the Greek πλατύ platy, meaning "flat" and ἕλμινς (root ἑλμινθ- helminth- The annelids, collectively called Annelida (from Latin anellus "little ring" are a large phylum of Animals comprising A group of organisms is said to have common descent if they have a common Ancestor.

He also discovered the chromosomal XY sex-determination system in 1905—that males have XY and females XX sex chromosomes. A chromosome is an organized structure of DNA and Protein that is found in cells. The XY sex-determination system is the Sex-determination system found in Humans most other Mammals some insects ( Drosophila) and some Nettie Stevens independently made the same discovery the same year. Nettie Maria Stevens ( July 7, 1861 - May 4, 1912) was an early American Geneticist.

Professor Wilson published many papers on embryology, and served as president of the American Association for the Advancement of Science in 1913. The American Association for the Advancement of Science (AAAS founded in 1848 is the world's largest general scientific society The American Association for the Advancement of Science (or AAAS) is an organization that promotes cooperation between Scientists defends scientific freedom encourages Year 1913 ( MCMXIII) was a Common year starting on Wednesday (link will display the full calendar of the Gregorian calendar (or a Common

Works

• An Introduction to General Biology (1887), with W. T. Sedgwick
• The Embryology of the Earthworm (1889)
• Amphioxus, and the Mosaic Theory of Development (1893)
• Atlas of Fertilization and Karyokinesis (1895)
• The Cell in Development and Inheritance (1896; second edition, 1915; third edition, 1925)

• This article incorporates text from an edition of the New International Encyclopedia that is in the public domain. William Thompson Sedgwick ( December 29 1855, West Hartford &ndash January 25 1921, Boston) was a key figure in shaping The lancelets (subphylum Cephalochordata, traditionally known as amphioxus) are a group of primitive Chordates. In Medicine ( Genetics) a mosaic or mosaicism denotes the presence of two populations of cells with different Genotypes in one Mitosis is the process in which a Eukaryotic cell separates the Chromosomes in its Cell nucleus, into two identical sets in two daughter nuclei The New International Encyclopedia was an English -language encyclopedia first published in the early 1900s The public domain is a range of abstract materials &ndash commonly referred to as Intellectual property &ndash which are not owned or controlled by anyone

References

• Al-Awqati, Q. 2002. Edmund Beecher Wilson: America's First Cell Biologist. Living Legacies, Columbia University.
• Gilbert, S. F. 2003. Edmund Beecher Wilson and Frank R. Lillie and the relationship between evolution and development, Developmental Biology, Seventh edition, Sinauer