Question

The cloning technique that was used to create the first cloned mammal (a sheep named Dolly) was called _____ cell nuclear transfer.

a) Somatic
b) Reproductive
c) Embryonic
d) Somatic cell nuclear transfer

Answer 1

The first cloned mammal, Dolly the sheep, was created using a technique known as somatic cell nuclear transfer, where a nucleus from a somatic cell is fused with an enucleated egg cell.

Step-by-step explanation:

The cloning technique used to create the first cloned mammal, a sheep named Dolly, was called somatic cell nuclear transfer.

In this process, scientists removed the nucleus from a donor egg cell. This enucleated egg was then fused with a nucleus from a somatic cell taken from another sheep. The somatic cell nucleus carried the full genetic information necessary to produce an identical clone. After fusion, the egg began to divide, developing into a blastocyst stage before being implanted in a surrogate mother. The success of this technique paved the way for reproductive cloning of other animals and opened discussions about therapeutic cloning and bioethical considerations associated with cloning. Dolly was a Finn-Dorset sheep, a fact determined by the donor nucleus' origin, which was from an adult Finn-Dorset sheep's mammary gland cell.