Exam 20: The Genetic Control Of Animal Development

Which of the following can be used to study developmental pathways? 1)Identifying genes whose products are involved in the differentiation of specific phenotypes 2)Identifying genes whose products are involved in the dedifferentiation of genotypes 3)Identifying proteins whose products are not involved in the differentiation of specific phenotypes

Translation of the Sxl mRNA in XY embryos results in

Which of the following is the master regulator of the Drosophila sex-determination pathway?

How is a chimeric mouse characterized?

Which of the following types of cells gives rise to germ line cells in Drosophila?

Why is C.elegans an excellent model system to study development?

Which of the following signals is used in the sex determination pathway in both Drosophila and C.elegans.

The process of determining the fate of an undifferentiated cell using a signal from a differentiated cell is known as

What is encoded by the somatic sex-determination pathway in Drosophila?

Which statement does not apply to sex determination in Drosophila?

Geneticists can study development in vertebrates by: 1)Applying knowledge gained from the study of model invertebrates 2)Analyzing mutations and phenocopies of mutant genes in model vertebrates such as mice and zebrafish 3)Examining the differentiation of stem cells

The term "syncytium" refers to which of the following stages of Drosophila development?

Why were frogs and sea urchins typically used to study development in classical anatomy and embryology? 1)The eggs developed outside of the mother. 2)The eggs were easily manipulated. 3)The animals were easy to breed.

Maternal-effect gene products are involved in: 1)Dorsal-ventral axes determination in Drosophila 2)Anterior-posterior axes determination in Drosophila 3)Dorsal-ventral axes determination in C.elegans

In Drosophila a single layer of cells on the embryo's surface,which will give rise to all somatic tissues in the organism is known as

Which statement is false with regard to development in C.elegans?

Which of the following genes is a maternal-effect gene in Drosophila?

The system to ascertain the X:A ratio involves interactions between which of the following?

Which of the following genes is involved in sex-determination and in dosage compensation in Drosophila?

Which of the following is another name for selector genes?