AP BIOLOGY

Detailed explanation-1: -Somatic Cell Nucleus Transfer (the most common technique used to clone animals) has however also produced healthy cattle and pig clones, and healthy offspring, that are similar to their conventional counterparts based on parameters such as physiological characteristics, demeanour and clinical status.

Detailed explanation-2: -Livestock species that scientists have successfully cloned are cattle, swine, sheep, and goats. Scientists have also cloned mice, rats, rabbits, cats, mules, horses and one dog. Chickens and other poultry have not been cloned.

Detailed explanation-3: -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-4: -When the sperm and egg join, they grow into an embryo with two sets-one from the father’s sperm and one from the mother’s egg. In SCNT, the egg cell’s single set of chromosomes is removed. It is replaced by the nucleus from a somatic cell, which already contains two complete sets of chromosomes.