Exam 50: Animal Development

In vertebrates, cells of the neural crest develop into ____.

During gastrulation in sea urchins, invagination produces a cavity called the ____.

What determines the development of male or female sex organs in the human embryo?

Experiments on selective adhesion between ectoderm, mesoderm, and endoderm derived from amphibian embryos demonstrated that ____.

What are the characteristics of the animal and vegetal poles of the egg?

The chorion is produced from which primary tissue layer(s)?

At the cellular level, the development of an animal from a fertilized egg involves cell division by _____.

During the process of ____, blastomeres undergo extensive cellular rearrangements to produce an embryo with three distinct primary cell layers.

Describe the three stages of labor.

In a human fetus that has the XX combination of sex chromosomes, the gonads develop into ovaries.

Removal of webbing between human fingers is an example of ____.

In ____, the gray crescent establishes the ____ axis of the body.

Cells that undergo apoptosis are essential to the organism into adulthood.

The extraembryonic membrane that secretes fluid around the developing embryo is the ____.

Research indicates that ____ defects occur ____ often with multiple births than single births.

The information directing the development of the fertilized egg is provided by ____.

Compared to other mammals, the human brain is unique with respect to its ____.

As the period of fetal growth comes to an end, a steep rise in ____ levels directly causes ____.

Genetic testing performed on cells of the placenta is called ____, while a similar procedure that uses cells derived from the amniotic fluid is called ____.