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Flashcards in B3g-new Genes For Old Deck (11)
1

What is selective breeding?

-select the ones with the best characteristics
-breed them with eachother
-continue this process over several generations

2

What are the problems with selective breeding?

Reduces gene pool leading to inbreeding
-harmful recessive characteristics will accumulate
-lack of variation

3

What is genetic engineering?

Transfer of genes from one organism to another so that it produces useful biological products

4

What are the advantages of genetic engineering?

You can produce organisms with new and useful features very quickly

5

What is a disadvantage of genetic engineering?

Inserted genes may have unexpected harmful effects

6

What are some examples of genetic engineering?

1) taking genes that control beta-carotene production and putting it into rice. Humans convert carotene into vitamin A(solving vitamin A deficiency)
2) gene for human insulin production is put into bacteria. Bacteria produces insulin then it is extracted
3) transferring resistance to disease to useful plants like crops

7

Describe the stages of genetic engineering

1) select gene responsible for desired c
2) cut from DNA using restriction enzymes and isolate
3)insert genes into other organism (ligase enzymes)
4)organism replicates

8

What are the ethical issues with genetic engineering?

-wrong to engineer purely for human benefit(animal suffering)
-wont stop at plants and animals, decide characteristics of future children
-evolutionary consequences are unknown

9

What is gene therapy?

Changing a persons genes in an attempt to cure disorders

10

What are the 2 types of gene therapy?

-changing genes in body cells
-changing genes in gametes

11

Why is gene therapy involving gametes controversial?

-unexpected consequences causing a new set of problems inherited by all future generations
-creation of 'designer babies'