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Developmental Biology Basics

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Questions and Answers

What is the result of the fusion of the gamete nuclei?

The collection of genes that instruct the embryo to develop (correct)

The formation of blastomeres

The establishment of the three germ layers

The formation of the blastula

What is the purpose of the chemical signals exchanged between the cells of the germ layers?

To initiate gastrulation

To form specific organs at specific sites (correct)

To establish the three germ layers

To trigger the migration of certain cells

What is the term for the series of rapid mitotic divisions that occur immediately after fertilization?

Organogenesis

Fusion

Cleavage (correct)

Gastrulation

Which of the following cells undergo long migrations from their place of origin to their final location?

Blood cells, lymph cells, pigment cells, and gametes Signup and view all the answers

What is the term for the stage of embryonic development where the blastomeres undergo dramatic movements and change their positions relative to one another?

Gastrulation Signup and view all the answers

What is the primary function of the embryo in the development of an organism?

To translate genotype to phenotype Signup and view all the answers

What is the focus of modern developmental biology?

The investigation of temporal changes in gene expression and anatomical organization Signup and view all the answers

What is the collective term for the stages of development between fertilization and hatching (or birth)?

Embryogenesis Signup and view all the answers

What stimulates the egg to begin development and initiates a new individual?

Fusion of the gamete cells Signup and view all the answers

What is the common sequence of development that all animals, from earthworms to eagles, undergo?

Fertilization, cleavage, gastrulation, organogenesis, birth, metamorphosis, gametogenesis Signup and view all the answers