Shortly after the rediscovery of Mendel’s pea plant experiments, biologists began investigating whether Mendel’s laws applied to other species, as well. In England, a debate broke out about whether the color of racehorses might be governed by Mendel’s laws. Using the British Jockey Club registry of racehorse pedigrees, biologists made the following observations: A chestnut (red) stallion, when bred to chestnut mares, always produced chestnut foals. Certain black stallions, when bred to chestnut mares, produced only black foals. Other black stallions, when bred to chestnut mares, produced a mix of black foals and chestnut foals. Based on the observations described above, which color is dominant  and which is recessive in the racehorses? Group of answer choices they show incomplete dominance Black; Chestnut Mix of black and chestnut is dominant (hybrid). Neither color is dominant (codominance). Chestnut, Black

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Shortly after the rediscovery of Mendel’s pea plant experiments, biologists began investigating whether Mendel’s laws applied to other species, as well. In England, a debate broke out about whether the color of racehorses might be governed by Mendel’s laws. Using the British Jockey Club registry of racehorse pedigrees, biologists made the following observations:

  • A chestnut (red) stallion, when bred to chestnut mares, always produced chestnut foals.
  • Certain black stallions, when bred to chestnut mares, produced only black foals.
  • Other black stallions, when bred to chestnut mares, produced a mix of black foals and chestnut foals.

Based on the observations described above, which color is dominant  and which is recessive in the racehorses?

Group of answer choices
they show incomplete dominance
Black; Chestnut
Mix of black and chestnut is dominant (hybrid).
Neither color is dominant (codominance).
Chestnut, Black
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