Exam 32: An Amazingly Detailed Script: Animal Development

Predict what would happen if a fruit fly regulatory gene that codes for a leg replaced a frog gene in the same position.

Cells become more and more specialized as development progresses.

Place the following steps of organogenesis in the correct order: (1)neural crest cells break away,(2)neural folds grow into a neural tube,(3)the notochord induces development of the neural plate.

Cells first arrange themselves into layers during organogenesis.

Which cells are most important in initiating the production of bicoid protein?

A basic description of the function of morphogens is that they:

Which characteristic is typical of the vegetal pole of an embryo?

Homeobox sequences vary widely from one species to another.

What are the three phases of early embryonic development in animals,and what key events occur during each phase?

During cleavage,the vegetal pole of a frog egg contains larger cells than the animal pole.

A zygote with animal and vegetal poles demonstrates what characteristic of some animal zygotes?

Development occurs:

A highly conserved sequence of 180 base pairs that controls development in many species is a/an ________.

Which of the following happens first in vertebrate development?

The notochord induces the formation of the neural plate in vertebrates.

Refer to the figure below, and then answer the question that follows. -Which structure,A,B,C,or D,induces formation of the neural tube?

What action by the individual cells involved can assist processes involving cell movement such as gastrulation?

What are the three germ layers produced during gastrulation?

At which of the following levels does bicoid work in fruit flies?