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(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.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Using Figure 22.6, indicate the stage at which segmentation genes, homeotic genes, and egg-polarity genes would have an effect on development.

(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:(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.
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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