Brindle coloration is a black and brown striping pattern in some dogs. This fur coloration is controlled by different alleles at a single autosomal locus. There are three alleles, KB, kbr and ky. The KB allele is dominant over the other two alleles and produces a solid black color. The allele kbr produces the brindle color pattern and is dominant over the ky allele, which produces yellow fur. Give the genotypes of the parents and offspring in each cross. P: black X yellow; F1: ½ brindle and ½ black P: black X brindle; F1: ½ black, ¼ brindle and ¼ yellow P: brindle X yellow; F1: 100% brindle

Human Biology (MindTap Course List)
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Chapter19: Introduction To Genetics
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Problem 4CT: The young woman shown at right has albinismvery pale skin, white hair, and pale blue eyes. This...
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Brindle coloration is a black and brown striping pattern in some dogs. This fur coloration is controlled by different alleles at a single autosomal locus. There are three alleles, KB, kbr and ky. The KB allele is dominant over the other two alleles and produces a solid black color. The allele kbr produces the brindle color pattern and is dominant over the ky allele, which produces yellow fur. Give the genotypes of the parents and offspring in each cross.

  1. P: black X yellow; F1: ½ brindle and ½ black
  2. P: black X brindle; F1: ½ black, ¼ brindle and ¼ yellow
  3. P: brindle X yellow; F1: 100% brindle 
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