Question

The technique by which "Dolly" the sheep obtained is termed as:

• A. Cloning by zygote transfer
• B. Cloning by nuclear transfer
• C. Cloning without the help of gametes
• D. Cloning by tissue culture of somatic cells

Answer 1

The correct option is B Cloning by nuclear transfer

Dolly is the first sheep that 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 (from another sheep) which was cultured and transferred into the surrogate mother. This method is known as nuclear transfer. The sheep Dolly was identical in the characters with the mother who donated the diploid nucleus from the body cell.

Thus, the correct answer is option B.