🎓 IB Exam Prep

If a homozygous dominant individual (BB) is crossed with a homozygous recessive individual (bb), what percentage of the offspring will express the recessive phenotype?

A 0%
B 25%
C 50%
D 75%

✓ Correct Answer: Option A

All offspring from a BB x bb cross will be heterozygous (Bb). Since the dominant allele (B) is present, all will express the dominant phenotype, meaning 0% will express the recessive phenotype.

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