Third cleavage of frog's development is

Step-by-step solution

First and second cleavage in frog are holoblastic, complete, equal, vertical, whereas third cleavage is holoblastic, complete, unequal, latitudinal or horizontal and near the animal pole. It results in the formation 8 cells of which three are black micromeres which have less or no yolk, so divide faster and 4 are colourless macromeres.