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Answer :
Answer:
Bb and bb
Explanation:
one parent might be a carrier of the black-nose gene and the other parent is not OR both parents can be carriers of the black-nose gene.
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Final answer:
The genotypes of the blue-nose pit bull parents that produced puppies with black noses are either Bb and bb or Bb and Bb.
Explanation:
If a heterozygous blue-nose pit bull breeds with another blue nosed pit bull and their litter contains 2 puppies with black noses, we first need to make some assumptions about the genetics involved based on typical Mendelian inheritance. Let's assume that 'B' represents the dominant blue nose allele and 'b' represents the recessive black nose allele. Since we know that one of the parents is heterozyous (Bb) and the offspring have black noses (bb), the other parent must also carry at least one recessive 'b' allele to produce bb offspring. For both puppies to have black noses, both parents must have contributed a 'b' allele, making the genotypes of the parents Bb and bb or Bb and Bb.
