Question

The following are the events in the formation of the first cloned animal the sheep Dolly.
a) Removal of haploid nucleus from the ovum.
b) Implantation of ovum with diploid nucleus into the surrogate mother.
c) Collection of udder cell from the sheep.
d) Injection of diploid nucleus of udder cell into the enucleated ovum.
e) Development of a young clone.

The correct sequential order of these events is ________.

• A. abcde
• B. cabed
• C. cadbe
• D. edcba

Answer 1

Answer: (C)

cadbe

C. cadbe

Solution : In the cloning process of Dolly, the udder cells were first collected and haploid cells with removed nucleus from the ovum were collected from another sheep. They were fused together and the diploid nucleus was implanted into the surrogate mother from which the ovum was taken. The clone developed in the mother and represented the mother from which the udder cell was taken.

So the correct answer is "cadbe".