A) the egg is divided into four pairs of cells, which are implanted into the womb of other cows
B) in the eight cell stage, cells are separated and cultured until small embryos are formed, which are implanted into the womb of other cows
C) in the eight cell stage, the individual cells are separated under electrical field for further development in culture media
D) from this up to eight identical twins can be produced
Correct Answer: B
Solution :
[b] In cloning of cattle, a fertilised egg divides in 2, then in 4 and then in 8. This embryo is carefully removed from the womb and cultured until small embryo is formed, which are implanted into the womb of different 'host mother' cow. The economic advantages of cloning and transplanting cattle embryos are as follow Makes it possible to create identical copies, of the very best individuals in a population, such as the highest milk producing cow. Makes it possible to produce a genetically identical copy of an individual for tissue or organ transplantation. Extinct or endangered species can be repopulated through cloning.
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