What Pattern of Cleavage Is Characteristic of Mammals

Multiple Choice

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