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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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A morphogen __________.

  1. a. is a master regulator gene
  2. b. has different effects at different concentrations
  3. c. maintains the placenta
  4. d. kills bacteria

Summary Introduction

Introduction: The process where the zygote undergoes several changes to form a youngling is called as development. During the development, the regulated gene expression takes place. As a result, morphogens are produced, which regulate how the organism should develop into a youngling.

Explanation

Reasons for the correct statement:

Morphogens are the proteins that are produced as a result of gene expression during development. Based on the concentration of morphogens in a cell, the cell’s functions are altered accordingly. The morphogens’ effects depend upon its concentration in the cell and the development proceeds accordingly.

Option b. is given as “has different effects at different concentrations”.

As morphogens have different effects on the cells at different concentrations, option b. is correct.

Reasons for the incorrect statements:

Option a. is given as “is a master regulator gene”.

The set of genes responsible for maintaining the basic body plan of a human being is the master regulatory genes...

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