Looking for classes? Ksquare Career Institute, Bengaluru →
In cloning of cattle, a fertilized egg is taken out of the mother's womb and
A
in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cows
B
in the eight cell stage the individual cells are separated under electrical field for further development in culture media
C
from this upto eight identical twins can be produced
D
the egg is divided into 4 pairs of cells which are implanted into the womb of other cows
Detailed Solution
In this method of cloning cattle (embryo splitting), a fertilised egg is taken out of the womb of the mother.
The egg is allowed to divide, and at the eight-cell stage the cells are still totipotent.
The cells are separated from one another and each is cultured in a nutrient medium until it grows into a small embryo.
These embryos are then implanted into the wombs of other cows (surrogate mothers), where they complete their development.
All the calves produced are genetically identical to one another, since they come from the same fertilised egg.
The separated cells are not implanted directly as single cells or pairs of cells, and they are not separated under an electric field.
So the correct description is that at the eight-cell stage the cells are separated and cultured until small embryos are formed, which are implanted into the womb of other cows.
The egg is allowed to divide, and at the eight-cell stage the cells are still totipotent.
The cells are separated from one another and each is cultured in a nutrient medium until it grows into a small embryo.
These embryos are then implanted into the wombs of other cows (surrogate mothers), where they complete their development.
All the calves produced are genetically identical to one another, since they come from the same fertilised egg.
The separated cells are not implanted directly as single cells or pairs of cells, and they are not separated under an electric field.
So the correct description is that at the eight-cell stage the cells are separated and cultured until small embryos are formed, which are implanted into the womb of other cows.