Given a positive genetic correlation between the lengths of the maxilla and the mandible of a bird bill (and in which the ancestral state is a short bill), selection for a longer bill without pleiotropic effects can result in - A. either part will shorten but not both. B. both maxilla and mandible becoming longer. C. both maxilla and mandible will not change from the ancestral short length. D. either part will lengthen but not both.
Given a positive genetic correlation between the lengths of the maxilla and the mandible of a bird bill (and in which the ancestral state is a short bill), selection for a longer bill without pleiotropic effects can result in - A. either part will shorten but not both. B. both maxilla and mandible becoming longer. C. both maxilla and mandible will not change from the ancestral short length. D. either part will lengthen but not both.
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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Given a positive genetic correlation between the lengths of the maxilla and the mandible of a bird bill (and in which the ancestral state is a short bill), selection for a longer bill without pleiotropic effects can result in -
A. either part will shorten but not both.
B. both maxilla and mandible becoming longer.
C. both maxilla and mandible will not change from the ancestral short length.
D. either part will lengthen but not both.
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