In a monohybrid cross between two heterozygous individuals (Bb x Bb), what is the expected phenotypic ratio of the offspring?

A 1:1

B 2:1

C 3:1

D 1:2:1

✓ Correct Answer: Option C

For a monohybrid cross between two heterozygotes, if B is dominant, the expected phenotypic ratio is 3 dominant phenotype : 1 recessive phenotype. The genotypic ratio is 1:2:1.

💡 Why is C) the correct answer?

The correct answer to the question "In a monohybrid cross between two heterozygous individuals (Bb x Bb), what is the expected phenotypic ratio of the offspring?" is Option C: 3:1.

The other options — A) 1:1, B) 2:1, D) 1:2:1 — are incorrect for this IB Exam Prep question. As explained above: For a monohybrid cross between two heterozygotes, if B is dominant, the expected phenotypic ratio is 3 dominant phenotype : 1 recessive phenotype. The genotypic ratio is 1:2:1.

📚 About This IB Exam Prep Practice Question

This 2-level IB Exam Prep question from the Biology topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free IB Exam Prep practice test or use flashcards for spaced repetition review.

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In a monohybrid cross between two heterozygous individuals (Bb x Bb), what is the expected phenotypic ratio of the offspring?

✓ Correct Answer: Option C

📚 About This IB Exam Prep Practice Question

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