Question

Dolly sheep cloned by Dr. Ian Wilmut was genetically identical to

• A. The donor sheep which donated diploid nucleus
• B. The sheep which donated the egg cell
• C. The surrogate mother
• D. The sheep which donated haploid nucleus

Answer 1

Answer: (A)

The donor sheep which donated diploid nucleus

• Dolly is the first sheep which was developed by the technique of cloning.
• The sheep was developed from the diploid body cell. The somatic cell from the mother sheep was taken and the nucleus was injected into the egg cell.
• This egg cell was cultured and transferred to the surrogate mother.
• The sheep Dolly was identical in the characters with the mother who donated the diploid nucleus from the body cell.
• The genes from the mother cells were transferred to Dolly.
• Thus, the correct answer is option A.