This embryo has 8 cells.
Step-by-step explanation:
- Just after fertilisation the embryo under goes cleavage.
- In frog, the first division takes place at the vegetal pole .
- Before the first division completes the second division begins at the animal pole, at right angles to the first division.
- At this stage the embryo has four cells.
- The third division occur at the equitorial plane, but slightly towards the animal pole.
- this third division divides the embryo into two regions: a ) rapidly dividing dividing region of micromeres b) slowly dividing region of macromeres.
- after third division there are 4 micromeres towards the animal pole and 4 macromeres at the vegetal pole.