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In labrador retrievers, the allele for black coat color (B) is dominant to the allele for brown coat color (b). However, if a lab has two copies of the recessive allele for a pigment-depositing gene (e), it can only have yellow coat color. In a cross of two doubly heterozygous black labs (BbEe x BbEe), what fraction of the next generation would one expect to be yellow?
  • a)
    3/16
  • b)
    1/8
  • c)
    1/16
  • d)
    1/4
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
In labrador retrievers, the allele for black coat color (B) is dominan...
From the Punnett square, we can see that there are 4 genotypes (BbEe, BBEe, BbEE, bbEe) that correspond to a yellow coat color. Out of the 16 possible offspring, 4 have the genotype for yellow coat color.
Therefore, the fraction of the next generation that would be expected to be yellow is 4/16, which simplifies to 1/4.
Therefore, the correct option is D. 1/4.
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In labrador retrievers, the allele for black coat color (B) is dominant to the allele for brown coat color (b). However, if a lab has two copies of the recessive allele for a pigment-depositing gene (e), it can only have yellow coat color. In a cross of two doubly heterozygous black labs (BbEe x BbEe), what fraction of the next generation would one expect to be yellow?a)3/16b)1/8c)1/16d)1/4Correct answer is option 'D'. Can you explain this answer? for MCAT 2025 is part of MCAT preparation. The Question and answers have been prepared according to the MCAT exam syllabus. Information about In labrador retrievers, the allele for black coat color (B) is dominant to the allele for brown coat color (b). However, if a lab has two copies of the recessive allele for a pigment-depositing gene (e), it can only have yellow coat color. In a cross of two doubly heterozygous black labs (BbEe x BbEe), what fraction of the next generation would one expect to be yellow?a)3/16b)1/8c)1/16d)1/4Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for MCAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In labrador retrievers, the allele for black coat color (B) is dominant to the allele for brown coat color (b). However, if a lab has two copies of the recessive allele for a pigment-depositing gene (e), it can only have yellow coat color. In a cross of two doubly heterozygous black labs (BbEe x BbEe), what fraction of the next generation would one expect to be yellow?a)3/16b)1/8c)1/16d)1/4Correct answer is option 'D'. Can you explain this answer?.
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