The nucleus used to clone Dolly the sheep was taken from
- 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.
Related questions
A restriction endonuclease is used in genetic engineering to
The enzyme used to seal the gene permanently into the plasmid is
Human insulin for diabetic patients is now produced mainly by
The polymerase chain reaction is used to
In gel electrophoresis, DNA fragments move towards the positive electrode because