NEET BIOLOGY

Detailed explanation-1: -Dolly was cloned from a cell taken from the mammary gland of a six-year-old Finn Dorset sheep and an egg cell taken from a Scottish Blackface sheep. She was born to her Scottish Blackface surrogate mother on 5th July 1996.

Detailed explanation-2: -Dolly remained alive and well long after her birth, with a functional heart, liver, brain, and other organs, all derived genetically from the nuclear DNA of an adult mammary gland cell. The technique used to produce her later became known as somatic cell nuclear transfer (SCNT).

Detailed explanation-3: -Dolly, the world’s most famous and controversial sheep, was born twenty years ago – on July 5, 1996 to be precise. She was the first mammal to enter the world following a process of reproductive cloning, making the event a spectacular scientific breakthrough.

Detailed explanation-4: -“Dolly was the first example of taking an adult cell and getting an adult, ” Lovell-Badge says. “That meant you could reprogram an adult cell nucleus back to an embryonic stage.” Dolly died on February 14, 2003, at age six from a lung infection common among animals who are not given access to the outdoors.

Detailed explanation-5: -Then the embryo is implanted into an adult female’s uterus to grow. In 1996, Scottish scientists cloned the first animal, a sheep they named Dolly. She was cloned using an udder cell taken from an adult sheep. Since then, scientists have cloned cows, cats, deer, horses, and rabbits.