Under the microscope,you observe the first few cell divisions of an embryo.Instead of dividing the entire ball,the divisions are only separating the top half into smaller and smaller spheres.The bottom half appears to remain as one large cell.What is a likely explanation?
A)It is a bird or fish embryo.
B)A developmental error has occurred.
C)Gastrulation has occurred.
D)The bottom half is the notochorD.

Question

Quizplus · Accepted Answer

This observation is characteristic of meroblastic cleavage, which is common in bird and fish embryos due to the presence of a large yolk in their eggs. The yolk inhibits cytokinesis, leading to partial division of the embryo.

Under the Microscope,you Observe the First Few Cell Divisions of an Embryo.Instead