(a) 2-hour embryo 1The anterior-posterior and dorsal-ventral axes of the embryo are established. Dorsal Anterior Posterior Ventral Early embryo (b) 10-hour embryo 2 The number and orientation of the body segments are established. Head Thoracic Abdominal segments segments (c) Adult 3 The identity of each individual segment is established. 22.6 In an early Drosophila embryo, the major body axes are established, the number and orientation of the body segments are determined, and the identity of each individual segment is established. Different sets of genes control each of these three stages.
(a) 2-hour embryo 1The anterior-posterior and dorsal-ventral axes of the embryo are established. Dorsal Anterior Posterior Ventral Early embryo (b) 10-hour embryo 2 The number and orientation of the body segments are established. Head Thoracic Abdominal segments segments (c) Adult 3 The identity of each individual segment is established. 22.6 In an early Drosophila embryo, the major body axes are established, the number and orientation of the body segments are determined, and the identity of each individual segment is established. Different sets of genes control each of these three stages.
Anatomy & Physiology
1st Edition
ISBN:9781938168130
Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Chapter8: The Appendicular Skeleton
Section: Chapter Questions
Problem 9ILQ: Watch this animation (http://openstaxcollege.org/l/limbbuds) to follow the development and growth of...
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Question
Using Figure 22.6, indicate the stage at which segmentation genes, homeotic genes, and egg-polarity genes would have an effect on development.
Transcribed Image Text:(a) 2-hour embryo
1The anterior-posterior and
dorsal-ventral axes of the
embryo are established.
Dorsal
Anterior
Posterior
Ventral
Early embryo
(b) 10-hour embryo
2 The number and
orientation of the body
segments are established.
Head Thoracic Abdominal
segments segments
Transcribed Image Text:(c) Adult
3 The identity of each
individual segment is
established.
22.6 In an early Drosophila embryo, the major body axes are established, the
number and orientation of the body segments are determined, and the identity
of each individual segment is established.
Different sets of genes control each of these three stages.
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