In Drosophila development,which of the following choices is true?
A)Paternal genes determine the initial course of the development after fertilization.
B)Zygotic genes determine the initial course of the development after fertilization.
C)Maternal genes determine the initial course of the development after fertilization.
D)Syncytial blastoderm genes determine the initial course of the development after fertilization.

Question

Quizplus · Accepted Answer

Drosophila development is characterized by a maternal contribution of factors that determine the initial course of development after fertilization. Maternal genes direct the formation of the egg, and their products are deposited in the developing embryo. These maternal gene products then regulate the expression of zygotic genes, which ultimately determine the development of the organism. Paternal genes also contribute to the development of the embryo, but they do not play a dominant role in determining the initial course of development. The syncytial blastoderm stage refers to the early stage of development in which the embryo is a single multinucleate cell that has not yet divided into smaller cells. While the syncytial blastoderm stage is important for overall embryo development, it does not determine the initial course of development.

In Drosophila Development,which of the Following Choices Is True