Snapdragon plants exhibit incomplete dominance in flower colour and this is controlled by a single locus.  It is possible to have red flowers (RR), pink flowers (Rr) or white flowers (rr).  Five years ago, a researcher randomly collected data on 1500 snapdragon plants.  They found 60 red, 480 pink, and 960 white. You now collect data on these plants from the same area and find: 540 red, 720 pink, and 240 white.  Has there been evolution in this population? If yes, is natural selection involved? Explain and justify your answers.

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
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Snapdragon plants exhibit incomplete dominance in flower colour and this is controlled by a single locus.  It is possible to have red flowers (RR), pink flowers (Rr) or white flowers (rr).  Five years ago, a researcher randomly collected data on 1500 snapdragon plants.  They found 60 red, 480 pink, and 960 white. You now collect data on these plants from the same area and find: 540 red, 720 pink, and 240 white.  Has there been evolution in this population? If yes, is natural selection involved? Explain and justify your answers.

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