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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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To determine the effect of the bicoid gene, scientists injected bicoid mRNA into the posterior end of freshly laid fruit fly eggs. What effect would you expect such an injection to have on the flies’ development?

Summary Introduction

To explain: The effect of injecting bicoid mRNA into the posterior end of the freshly-laid fruit fly eggs.

Concept introduction: Fruit flies are excellent model organisms to study development. The anterior and posterior axis is predetermined in the egg itself. Bicoid mRNA is the maternal effect stored in the anterior region of the egg, that later translates after fertilization, and produces bicoid protein that defines the anterior region of the embryo.

Explanation

In the fruit flies, after fertilization, the bicoid mRNA is translated into the bicoid protein. The concentration of the bicoid protein is highest in the anterior end. The head and the rest of the parts are formed where bicoid concentration is the highest...

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