120 likes | 211 Views
Learn about the innovative genetic engineering techniques used in insulin production and genetically modified crops for sustainable agriculture. Discover how genetic engineers tackle inheritable traits and the ethics behind utilizing genetic modifications.
E N D
Inheritance & Survival Genetic Engineering
Genetic Engineering • Why can we not use pig organs in humans? • There is a shortage of hearts and kidneys for transplant – why not use a pig? • Biology text book p188
Manufacturing Insulin • Insulin is needed to keep diabetics alive. • Human insulin works best with humans • It is possible to obtain small amounts of human insulin from dead bodies.
Manufacturing Insulin • There are insufficient supplies of human insulin to meet demand. • Genetic engineers have devised ways of taking the human insulin gene – putting that gene into bacteria that then make insulin.
Making insulin • The gene for insulin is “cut” from the DNA of a human. • This is done by using enzymes.
Making insulin • Plasmids (small circles of DNA) are obtained from bacteria. • These plasmids are then cut open with enzymes.
Making insulin • The human insulin gene is “spliced” into the bacterial plasmid. • The plasmid is re-introduced to the bacteria.
Making insulin • The bacteria are grown in large tanks until there are millions of them. • All the plasmids will be busy making “human” insulin
Making insulin • This insulin can then be used by diabetics!
Genetically Modified Crops GM crops
GM Crops • Read carefully through the sheet entitled “Genetic Modification”
GM Crops • Make a list of the advantages of GM crops. • Make a list of the reasons people maybe be against the use of GM crops.