Download - Inheritance & Survival
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Inheritance & Survival
Genetic Engineering
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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
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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.
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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.
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Making insulin
The gene for insulin is “cut” from the DNA of a human.
This is done by using enzymes.
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Making insulin
Plasmids (small circles of DNA) are obtained from bacteria.
These plasmids are then cut open with enzymes.
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Making insulin
The human insulin gene is “spliced” into the bacterial plasmid.
The plasmid is re-introduced to the bacteria.
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Making insulin
The bacteria are grown in large tanks until there are millions of them.
All the plasmids will be busy making “human” insulin
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Making insulin
This insulin can then be used by diabetics!
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Genetically Modified Crops
GM crops
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GM Crops
Read carefully through the sheet entitled “Genetic Modification”
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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.