Question

Immediately after fertilization of a Drosophila egg, the zygote nucleus undergoes a series of divisions. Subsequent nuclear migration generates an ________.

A) Syncytial blastoderm
B) Maternal effect
C) Homeodomain
D) Zygote
E) Cleavage nucleus

Answer 1

The correct answer will be option-A

Step-by-step explanation:

The embryogenesis of Drosophila is very rapid and precise. After fertilization, much syncytial division (fusion of uni-nuclear cells) takes place within the first two to three hours.

The division forms around 6000 nuclei around the periphery of the embryo in which around 10th syncytial division, pre-syncytial blastoderm is formed. The syncytial blastoderm is formed into cellular blastoderm around 14th cycle.

Thus, option-A is the correct answer.