LIFE SCIENCE

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 the Sheep was announced to the word with a paper published in 1997, in the journal Nature, succinctly titled “Viable offspring derived from fetal and adult mammalian cells”.

Detailed explanation-3: -The goal was to create transgenic animals-those with foreign genes inserted into their genomes-that could be used to make stem cells or proteins to treat diseases. The original sheep cloners were working with a company that hoped to extract a human protein from sheep milk that would treat diabetes.

Detailed explanation-4: -On July 5, 1996, Dolly the sheep-the first mammal to have been successfully cloned from an adult cell-is born at the Roslin Institute in Scotland.