what organism did mendel use?
He continued teaching part-time, and began his experiments with cross-breeding garden peas.
neutral
 Mendel 's work went largely unnoticed after its first publication in 1866 , but was rediscovered in the late 19th @-@ century by Hugo de Vries , Carl Correns , and Erich von Tschermak , who ( claimed to have ) reached similar conclusions in their own research . Specifically , in 1889 , Hugo de Vries published his book Intracellular Pangenesis , in which he postulated that different characters have individual hereditary carriers and that inheritance of specific traits in organisms comes in particles . De Vries called these units " pangenes " ( Pangens in German ) , after Darwin 's 1868 pangenesis theory . 

contradiction
 The father of genetics is Gregor Mendel , a late 19th @-@ century scientist and Augustinian friar . Mendel studied ' trait inheritance ' , patterns in the way traits were handed down from parents to offspring . He observed that organisms ( pea plants ) inherit traits by way of discrete " units of inheritance " . This term , still used today , is a somewhat ambiguous definition of what is referred to as a gene . 

neutral
 In 1909 , Richard Richter developed the first intrauterine device made from silkworm gut , which was further developed and marketed in Germany by Ernst Gräfenberg in the late 1920s . Gregory Pincus and John Rock with help from the Planned Parenthood Federation of America developed the first birth control pills in the 1950s , such as mestranol / noretynodrel , which became publicly available in the 1960s through the Food and Drug Administration under the name Enovid . Medical abortion became an alternative to surgical abortion with the availability of prostaglandin analogs in the 1970s and mifepristone in the 1980s . 

neutral
 Around this time , developments in chemotherapy offered some hope . The doctors had not told Ruth that he had cancer because of his family 's fear that he might do himself harm . They treated him with teropterin , a folic acid derivative ; he may have been the first human subject . Ruth showed dramatic improvement during the summer of 1947 , so much so that his case was presented by his doctors at a scientific meeting , without using his name . He was able to travel around the country , doing promotional work for the Ford Motor Company on American Legion Baseball . He appeared again at another day in his honor at Yankee Stadium in September , but was not well enough to pitch in an old @-@ timers game as he had hoped . 

entailment
 From 1934 to 1939 Reich conducted what he called the bion experiments , which he published as Die Bione : Zur Entstehung des vegetativen Lebens in Oslo in February 1938 ( published in English in 1979 and later called The Bion Experiments on the Origin of Life ) . He examined protozoa and grew cultured vesicles using grass , sand , iron and animal tissue , boiling them and adding potassium and gelatin . Having heated the materials to incandescence with a heat @-@ torch , he wrote that he had seen bright , glowing , blue vesicles . He called them " bions " and believed they were a rudimentary form of life , halfway between life and non @-@ life . He wrote that when he poured the cooled mixture onto growth media , bacteria were born , dismissing the idea that the bacteria were already present in the air or on other materials . 
