The nucleus used to clone Dolly the sheep was taken from
Correct answer: A. an adult mammary gland cell
- A. an adult mammary gland cell
- B. a red blood cell
- C. a sperm cell
- D. an unfertilised egg's own nucleus
Explanation
Dolly proved that the nucleus of an adult, specialised cell still contains a complete genome able to direct development. A red blood cell has no nucleus, and the egg's own nucleus was removed first.
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Biotechnology applies genetic engineering, cell culture and recombinant DNA methods to medicine and public health. The material includes production of insulin, vaccines and antibiotics, diagnostic techniques, gene therapy, genetically modified organisms and the ethical concerns surrounding manipulation of human genes.
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