Question

1.Explain how an organism like dolly the sheep was cloned.

2. Explain how our dna carries genetic material. Include in the discussion the structure of dna and how science determined complementary " base paring occurs.

3. Explain what a greenhouse gas is and how does it affect the earths temperature.

4. Since earths temperature has a cyclical history of low and high tempatures why do we think it is a problem now.

5. Describe the process by which our dna makes copies of itself every time a cell divides.

6. Write the complementary base pairs for the following sequences of dna ATAGGGCGT, TCCTAGGCA, TTCGCCTAA, GGACCTAG

7. Why do you think we study the ozone layer on earth primary at the south pole.

8. Why do we think that greenhouse gases such as carbon dioxide can affect the earths temperature.

9. Explain why deserts can be so hot during the day, yet get below freezing at night.

10. explain what a transgenic organism is, and how one is created

11. Explain how we get proteins for example insulin from e coli bacteria using genetic engineering.

12. What problems should we be concerned with genetic engineering as europe has banned any genetically modified foods.

13. Explain your position whether you think it is a good thing or not on genetically modifying or cloning humans.

14. Explain what electrophoresis is and how it is used to identify individuals

Answer 1

1. Scientists produced white faced Dolly at the Roslin Institute in Scotland after 277 attempts from a 6 year old white sheep’s udder cell. The scientist altered the medium in which the cells were kept to stop its growth but keep them alive. This cell was injected into an unfertilized egg cell, of Scottish Blackface ewe, from which the nucleus was removed. The cells were fused using electrical pulses. Eventually these cells were fused and an embryo developed from them. It was cultured for 6-7 days to see and when it divided and developed normally, it was implanted into a surrogate Scottish Blackface ewe. Finally the pregnancy went to full term after 29 embryos were implanted into 13 surrogate mothers. After 148 days a 6.6 kg Dolly was born.