Genetica leyes de mendel yahoo dating

genetica leyes de mendel yahoo dating

Gregor Johann Mendel ( Czech : Řehoř Jan Mendel ; [1] 20 July 1822 [2] – 6 January 1884) ( English / ˈ m ɛ n d əl / ) was a scientist, Augustinian friar and abbot of St. Thomas' Abbey in Brno , Margraviate of Moravia . Mendel was born in a German-speaking family [3] in Silesian part of Austrian Empire (today's Czech Republic ) and gained posthumous recognition as the founder of the modern science of genetics . Though farmers had known for centuries that crossbreeding of animals and plants could favor certain desirable traits , Mendel's pea plant experiments conducted between 1856 and 1863 established many of the rules of heredity , now referred to as the laws of Mendelian inheritance . [4]

Mendel worked with seven characteristics of pea plants: plant height, pod shape and color, seed shape and color, and flower position and color. With seed color, he showed that when a yellow pea and a green pea were bred together their offspring plant was always yellow. However, in the next generation of plants, the green peas reappeared at a ratio of 1:3. To explain this phenomenon, Mendel coined the terms “ recessive ” and “ dominant ” in reference to certain traits. (In the preceding example, green peas are recessive and yellow peas are dominant.) He published his work in 1866, demonstrating the actions of invisible “factors”—now called genes —in providing for visible traits in predictable ways.

The profound significance of Mendel's work was not recognized until the turn of the 20th century (more than three decades later) with the independent rediscovery of these laws. [5] Erich von Tschermak , Hugo de Vries , Carl Correns , and William Jasper Spillman independently verified several of Mendel's experimental findings, ushering in the modern age of genetics. [4]

He became a friar because it enabled him to obtain an education without having to pay for it himself. [8] He was given the name Gregor ( Řehoř in Czech) [1] when he joined the Augustinian friars . [9]

After he was elevated as abbot in 1868, his scientific work largely ended, as Mendel became consumed with his increased administrative responsibilities, especially a dispute with the civil government over their attempt to impose special taxes on religious institutions. [14] Mendel died on 6 January 1884, at the age of 61, in Brno , Moravia , Austria-Hungary (now Czech Republic), from chronic nephritis . Czech composer Leoš Janáček played the organ at his funeral. After his death, the succeeding abbot burned all papers in Mendel's collection, to mark an end to the disputes over taxation. [15]

Mendel began his studies on heredity using mice. He was at St. Thomas's Abbey but his bishop did not like one of his friars studying animal sex, so Mendel switched to plants. [28] Mendel also bred bees in a bee house that was built for him, using bee hives that he designed. [29] He also studied astronomy and meteorology , [13] founding the 'Austrian Meteorological Society' in 1865. [12] The majority of his published works were related to meteorology. [12]

Mendel also experimented with hawkweed ( Hieracium ) [30] and honeybees . He published a report on his work with hawkweed, [31] a group of plants of great interest to scientists at the time because of their diversity. However, the results of Mendel's inheritance study in hawkweeds was unlike his results for peas; the first generation was very variable and many of their offspring were identical to the maternal parent. In his correspondence with Carl Nägeli he discussed his result but was unable to explain them. [30] It was not appreciated until the end of the nineteen century that many hawkweed species were apomictic , producing most of their seeds through an asexual process.



Genetics - definition of genetics by The Free Dictionary