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Scientists Identify Genetic Basis For The Black Sheep Of The Family
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Researchers have now identified the genetic basis for black coat color, and white, in a breed of domestic sheep. Scientists at the CSIRO Queensland Bioscience Precinct in Australia have now taken this step and identified the molecular mechanisms underlying white and black coat color in domestic sheep."We discovered a novel mechanism in which the dominant white sheep is caused by the ubiquitous expression of a duplicated agouti coding sequence located immediately downstream of a duplicated ITCH gene promoter region." It was found that recessive black sheep harbor only poorly expressed non-duplicated agouti alleles, likely a result of a defective single-copy ancestral agouti gene promoter.
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15-Jul-08 |
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Keywords
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animals, discovery, genetics, science, sheep |
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