Answered: Some marine fishes exhibit a…

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter5: The Inheritance Of Complex Traits

Section: Chapter Questions

Problem 14QP: Can conjoined (Siamese) twins be dizygotic twins in light of the theory that conjoined twins result...

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Some marine fishes exhibit a spectacular polyphenism, in that individuals can, under special circumstances, change their sex from female to male (in other species, the switch goes from male to female). This developmental change involves reproductive organs, hormones, and mating behavior (Warner 1984). In some species, the removal of a dominant, breeding male from a cluster of females triggers a sex change in the largest female present. Identify the apparent developmental restrictions imposed on this system, such as the requirement that a female be transformed into a male rather than some sort of intermediate sex. Speculate on the benefits associated with each restriction.

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