What pattern of cleavage is characteristic of mammals?
A)holoblastic cleavage with eggs containing little or no yolk
B)some yolk,and cleavage resulting in vegetal and animal poles
C)meroblastic cleavage with eggs containing almost entirely yolk
D)holoblastic cleavage with eggs containing very little yolk,but with the inner cell mass concentrated at one pole
E)holoblastic cleavage with eggs containing very little yolk,but with the inner cell mass distributed uniformly

Question

Quizplus · Accepted Answer

Mammals undergo holoblastic cleavage, which means that the entire egg is divided into smaller cells. However, mammalian eggs contain very little yolk compared to other species. The inner cell mass, which eventually forms the embryo, is concentrated at one pole of the egg, known as the animal pole. This is characteristic of mammals and distinguishes them from other species that may have yolk or a more uniform distribution of cells.

What Pattern of Cleavage Is Characteristic of Mammals