INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
17th Edition
ISBN: 9781260704310
Author: HICKMAN
Publisher: MCGRAW-HILL CUSTOM PUBLISHING
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Textbook Question
Chapter 8, Problem 1RQ
What is meant by epigenesis? How did Kaspar Friedrich Wolff’s concept of epigenesis differ from the early notion of preformation?
Expert Solution
Summary Introduction
To define: Epigenesis.
Introduction: Epigenesis is a concept developed by German embryologist Kaspar Friedrich Wolff in 1759. It is an idea stating that the fertilized egg consists only of the building material, which gets assembled and forms the embryo’s body.
Explanation of Solution
Epigenesis states that the undifferentiated material present in the embryo will form its body. It states that undifferentiated granular material arranged in layers continues to become thinner in certain areas, to thicker in others, to segment, and to fold until the appearance of embryo’s body.
Expert Solution
Summary Introduction
To explain: The way in which the Kaspar Friedrich Wolff’s epigenesis concept differs from preformation.
Explanation of Solution
The Kaspar Friedrich Wolff’s epigenesis states that the undifferentiated material present in the embryo will form its body. But the concept of preformation is an early belief stating that the complete body of an individual was preformed in an egg or sperm cell.
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Chapter 8 Solutions
INTEGRATED PRINC.OF ZOOLOGY(LL)(FD)
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