horizontal gene transfer essays

horizontal gene transfer essays For centuries, humankind has made improvements to crop plants through selective breeding and hybridization, the controlled pollination of plants. Plant technology is an extension of this traditional plant breeding with one important difference, plant biotechnology allows for the transfer of a greater variety of genetic information in a more precise controlled manner. Since introduction of plant biotechnology, many farmers have planted millions of acres of biotech corn, cotton, soybeans, fruit, and other crops. While these new varieties have enhanced, crop protection reduced production costs and increased yields, raising concern among some consumers, legislators, and activists. Many critics of agricultural biotechnology have often been dismissed. Sywanen, a professor of medical microbiology, defends the concerns of biotechnology opponents in his article titled, "In search of a horizontal gene transfer". The impact of horizontal gene transfer concerns agricultural biotechnology critics who claim that genes inserted into domesticated organisms might be transferred to wild organisms, an example would be the transfer of antibiotic resistance marker genes to soil bacteria. Sywane's studies of bacterial and plant phylogeny indicate horizontal gene transfer is involved in evolutionary change. A disturbing consequence of horizontal gene transfer in bacteria is the potential for antibiotic resistance, and other traits carried on plasmids to migrate from one type of bacterium to another. There has been evidence suggesting that genomic DNA is transmitted in nature. In bacteria, conjugation is the most likely mechanism responsible for gene transfer. Another research stated that transposon-like elements are likely vehicles for cutting and pasting genomic DNA from one organism to another, and that viruses may be responsible for transmitting genes between eukaryotes. Sywanen argues that some of the gene frequency ...

Nontsikelelo Albertina Sisulu, South African Activist

Nontsikelelo Albertina Sisulu, South African Activist Albertina Sisulu (October 21, 1918–June 2, 2011) was a prominent leader in the African National Congress and the anti-Apartheid movement in South Africa. The wife of the well-known activist Walter Sisulu, she provided much-needed leadership during the years when most of the ANCs high command was either in prison or in exile. Fast Facts: Albertina Sisulu Known For: South African anti-apartheid activistAlso Known As: Ma Sisulu, Nontsikelelo Thethiwe, Mother of the NationBorn: October 21, 1918 in Camama,  Cape Province, South AfricaParents: Bonilizwe and Monikazi ThethiweDied: June 2, 2011 in Linden, Johannesburg, South AfricaEducation:  Johannesburgs Non-European Hospital, Mariazell CollegeAwards and Honors:  Honorary doctoral degree from the University of JohannesburgSpouse: Walter SisuluChildren: Max, Mlungisi, Zwelakhe, Lindiwe, NonkululekoNotable Quote: Women are the people who are going to relieve us from all this oppression and depression. The rent  boycott  that is happening in  Soweto  now is alive because of the women. It is the women who are on the street committees educating the people to stand up and protect each other. Early Life Nontsikelelo Thethiwe was born in the village of Camama, Transkei, South Africa, on October 21, 1918, to Bonilizwe and Monica Thethiwe. Her father Bonilizwe arranged for the family to live in nearby Xolobe while he was working in the mines; he died when she was 11. She was given the European name of Albertina when she started at the local mission school. At home, she was known by the pet name Ntsiki. As the eldest daughter, Albertina was often required to look after her siblings. This resulted in her being held back for a couple of years at primary school, and initially cost her a scholarship for high school. After intervention by a local Catholic mission, she was eventually given a four-year scholarship to Mariazell College in the Eastern Cape (she had to work during the holidays to support herself since the scholarship only covered term time). Albertina converted to Catholicism while at college and decided that rather than get married, she would help support her family by getting a job. She was advised to pursue nursing (rather than her first choice of being a nun). In 1939 she was accepted as a trainee nurse at Johannesburg General, a non-European hospital, and began work there in January 1940. Life as a trainee nurse was difficult. Albertina was required to buy her own uniform out of a small wage and spent most of her time in the nurses hostel. She experienced the ingrained racism of the white-minority led country through the treatment of senior black nurses by more junior white nurses. She was also refused permission to return to Xolobe when her mother died in 1941. Meeting Walter Sisulu Two of Albertinas friends at the hospital were Barbie Sisulu and Evelyn Mase (Nelson Mandelas first wife-to-be). It was through them that she became acquainted with Walter Sisulu (Barbies brother) and began a career in politics. Walter took her to the inaugural conference of the African National Congress (ANC) Youth League (formed by Walter, Nelson Mandela, and Oliver Tambo), at which Albertina was the only female delegate. It was only after 1943 that the ANC formally accepted women as members. In 1944, Albertina Thethiwe qualified as a nurse and, on July 15, she married Walter Sisulu in Cofimvaba, Transkei (her uncle had refused them permission to get married in Johannesburg). They held a second ceremony on their return to Johannesburg at the Bantu Mens Social Club, with Nelson Mandela as best man and his wife Evelyn as a bridesmaid. The newlyweds moved into 7372, Orlando Soweto, a house that belonged to Walter Sisulus family. The following year, Albertina gave birth to their first son, Max Vuysile. Starting a Life in Politics Prior to 1945, Walter was a trade union official but he was fired for organizing a strike. In 1945, Walter gave up his attempts to develop an estate agency to devote his time to the ANC. It was left to Albertina to support the family on her earnings as a nurse. In 1948, the ANC Womens League was formed and Albertina Sisulu joined immediately. The following year, she worked hard to support Walters election as the first full-time ANC secretary-general. The Defiance Campaign in 1952 was a defining moment for the anti-Apartheid struggle, with the ANC working in collaboration with the South African Indian Congress and the South African Communist Party. Walter Sisulu was one of 20 people arrested under the Suppression of Communism Act. He was sentenced to nine months of hard labor and suspended for two years for his part in the campaign. The ANC Womens League also evolved during the defiance campaign, and on April 17, 1954, several women leaders founded the non-racial Federation of South African Women (FEDSAW). FEDSAW was to fight for liberation, as well as on issues of gender inequality within South Africa. In 1954, Albertina Sisulu obtained her midwife qualification and began working for Johannesburgs City Health Department. Unlike their white counterparts, black midwives had to travel on public transport and carry all their equipment in a suitcase. Boycotting Bantu Education Albertina, through the ANC Womens League and FEDSAW, was involved in the boycott of Bantu Education. The Sisulus withdrew their children from the local government-run school in 1955 and Albertina opened her home as an alternative school. The Apartheid government soon cracked down on such practice and, rather than return their children to the Bantu education system, the Sisulus sent them to a private school in Swaziland run by Seventh Day Adventists. On August 9, 1956, Albertina was involved in the womens anti-pass protest, helping the 20,000 prospective demonstrators avoid police stops. During the march, the women sang a freedom song: Wathint abafazi, Strijdom! In 1958, Albertina was jailed for taking part in a protest against the Sophiatown removals. She was one of around 2,000 protestors who spent three weeks in detention. Albertina was represented in court by Nelson Mandela; all of the protesters were eventually acquitted. Targeted by the Apartheid Regime Following the  Sharpeville Massacre  in 1960, Walter Sisulu,  Nelson  Mandela, and  several others formed  Umkonto we Sizwe  (MK, the Spear of the Nation), the military wing of the ANC. Over the next two years, Walter Sisulu was arrested six times (though only convicted once) and Albertina Sisulu was targeted by the Apartheid government for her membership of the ANC Womens League and FEDSAW. Walter Sisulu Is Arrested and Imprisoned In April 1963 Walter, who had been released on bail pending a  six-year  prison sentence, decided to go underground and join up with the MK. Unable to discover the whereabouts of her husband, the SA authorities arrested Albertina. She was the first woman in South Africa to be detained under the  General Law Amendment Act No. 37 of 1963. She was initially placed in solitary confinement for two months, and then under dusk-till-dawn house arrest and banned for the first time. During her time in solitary, Lilliesleaf Farm (Rivonia) was raided and Walter Sisulu was arrested. Walter was sentenced to life imprisonment for planning acts of sabotage and sent to Robben Island on June 12, 1964 (he was released in 1989). The Aftermath  of the Soweto Student Uprising In 1974, the banning order against Albertina Sisulu was renewed. The requirement for partial house arrest was removed, but Albertina still needed to apply for special permits to leave Orlando, the township in which she lived. In June 1976 Nkuli, Albertinas youngest child and  second daughter, was caught in the periphery of the  Soweto student uprising. Two days before, Albertinas eldest daughter Lindiwe had been taken into custody and held at  a detention  center at John  Voster  square (where  Steve Biko  would die the following year). Lindiwe was involved with the  Black Peoples Convention  and  Black Consciousness Movement  (BCM). The BCM had a more militant attitude toward South African whites than the ANC. Lindiwe was detained for almost a year, after which she left for Mozambique and Swaziland.​ In 1979, Albertinas banning order was again renewed, though this time for only two years. The Sisulu family continued to be targeted by the authorities. In 1980 Nkuli, who was by then studying at Fort Hare  University, was detained and beaten by the police. She returned to Johannesburg to live with Albertina rather continue her studies. At the end of the year, Albertinas son  Zwelakhe was placed under a banning order that effectively curtailed his career as a journalist because he was prohibited from any involvement in the media. Zwelakhe was president of the Writers Association of South Africa at that time. Since Zwelakhe and his wife lived in the same house as Albertina, their respective  bans  had the curious result that they were not allowed to be in the same room as each other or talk to each other about politics. When Albertinas banning order ended in 1981, it was not renewed. She had been banned for a total of 18 years, the longest  anyone  had been banned in South Africa at that point. Being released from the ban meant that she could now pursue her work with FEDSAW, speak at meetings, and even be quoted in newspapers. Opposing the Tricameral Parliament In the early  1980s,  Albertina campaigned against the introduction of the Tricameral Parliament, which gave limited rights to Indians and Coloureds. Albertina, who was once again under a banning order, was unable to attend a critical conference at which the Reverend Alan Boesak proposed a united front against the Apartheid government plans. She indicated her support through FEDSAW and the Womens League. In 1983, she was elected president of FEDSAW. Mother of the Nation In August 1983, she was arrested and charged under the  Suppression of Communism Act  for allegedly furthering the aims of the ANC. Eight months earlier she had, with others, attended the funeral of Rose Mbele and draped an ANC flag over the coffin. It was also alleged that she delivered a pro-ANC tribute to the FEDSAW and ANC Womens League stalwart at the funeral. Albertina was elected, in absentia, president of the United Democratic Front (UDF) and for the first time she was referred to in print as the Mother of the Nation. The UDF was an umbrella group of hundreds of organizations opposed to Apartheid, which united both black and white  activists  and provided a legal front for the ANC and other banned groups. Albertina was detained in Diepkloof prison until her trial in October 1983, during which she was defended by George Bizos. In February 1984, she was sentenced to four years, two years suspended. At the last minute, she was given the right to appeal and was released on bail. The appeal was finally granted in 1987 and the case was dismissed. Arrested for Treason In 1985,  PW Botha  imposed  a state  of emergency. Black youths were rioting in the townships, and the Apartheid government responded by flattening Crossroads township, near Cape Town. Albertina was arrested again, and she and 15 other leaders of the UDF were charged with treason and instigating revolution. Albertina was eventually released on bail, but the conditions of the bail meant she could no longer participate in FEDWAS, UDF, and ANC Womens League events. The treason trial began in October but collapsed when a key witness admitted he could have been mistaken. Charges were dropped against most of the accused, including Albertina, in December. In February 1988, the UDF was banned under further State of Emergency restrictions. Leading an Overseas Delegation In 1989 Albertina was asked as the patroness of the principal black opposition group in  South Africa (the wording of the official invitation) to meet with U.S. president George W Bush, former president Jimmy Carter, and UK prime minister Margaret Thatcher. Both countries had resisted economic action against South Africa. She was given a special dispensation to leave the country and provided with a passport. Albertina gave many interviews while overseas, detailing the severe conditions for blacks within South Africa and commenting on what she saw as the Wests responsibilities in maintaining sanctions against the Apartheid regime. Parliament and Retirement Walter Sisulu was released from prison in October 1989. The ANC was un-banned the following year, and the Sisulus worked hard to re-establish its position in South African politics. Walter was elected deputy president of the ANC and Albertina was elected deputy president of the ANC Womens League. Death Both Albertina and Walter became members of parliament under the new transitional government in 1994. They retired from parliament and politics in 1999. Walter died after a long period of illness in May 2003. Albertina Sisulu died peacefully on June 2, 2011, at her home in Linden, Johannesburg. Legacy Albertina Sisulu was a major figure in the anti-apartheid movement and a symbol of hope for thousands of South Africans. Sisulu holds a special place in the hearts of South Africans, in part because of the persecution she experienced and in part because of her unflinching dedication to the cause of a liberated nation. Sources Albertina Sisulus Legacy. Southafrica.co.za.â€Å"Albertina Nontsikelelo Sisulu.†Ã‚  South African History Online, 25 Oct. 2018.Shepherd, Melinda C. â€Å"Albertina Sisulu.†Ã‚  Encyclopà ¦dia Britannica, 17 Oct. 2018.