Engenharia genetica

Trabalho de biologia proposto pelo docente José Salsa, com o interesse de nos dar a conhecer e de poder também informar outros cibernautas sobre este tema, principalmente abordando os assuntos éticos e sociais que a engenharia genética acarreta. Bem vindo ao mundo, onde os sonhos e os maiores medos são realidades!

quinta-feira, março 23, 2006

Alimentos geneticamente modificados

Um tomate concebido para se manter fresco durante muito tempo é um exemplo de um alimento geneticamente modificado. Milho concebido para resistir aos pesticidas é outro exemplo.
Os alimentos geneticamente modificados são, por exemplo, género de plantas cujas características genéticas foram modificadas. Os cientistas ajustam as suas características introduzindo neles um novo material genético, por exemplo, de uma bactéria capaz de resistir aos pesticidas.
Os animais também podem ser geneticamente modificados. Os cientistas estão a investigar a modificação genética de peixes, vacas e porcos, entre outros. Mas, actualmente, não existe no mercado carne geneticamente modificada.
Todos os animais, pessoas, plantas e bactérias contêm genes que decidem as nossas características.

fonte: www.bionetonline.org


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