Question

What is cloning? Explain how the first cloned mammal was born.

Answer 1

• Cloning is the method of production of genetically and morphologically identical copies of their parents.
• Dolly was the first mammal to be cloned successfully.
• In the process of cloning Dolly, the nucleus from the mammary cell of white Finn Dorsett sheep was first removed and then an unfertilised egg cell from Black ewe was enucleated.
• The nucleus of the mammary cell of the white sheep was then added to the enucleated egg cell of the Black ewe.
• This hybrid egg cell was then allowed to develop into an embryo.
• The embryo was further transferred into Black ewe to develop into a newborn sheep named as "Dolly".