Answered: of purple-feathered barn swallows. A…

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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An experiment is conducted on the eggs of purple-feathered barn swallows. A clutch of eggs from this nest is separated into two halves. One half of the eggs are left with the purple-feathered parents, and the other half of the eggs are moved to a nest built by gray-feathered barn swallows. Genetic analysis has shown that barn swallows have genes coding for feather color. Upon maturity, all barn swallows left with the original parents have purple feathers, while those that were transplanted have gray feathers. This experiment is repeated with a large number of other nests with similar results. What explains the results of this experiment? A:Color in barn swallows appears to follow a pattern of codominance. B:Genes in the transplant parents appear to influence feather color in barn swallows. C:Genes appear to have no influence on color pattern in barn swallows. D:Color in barn swallows appears to be influenced by both genes and the environment.

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