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Inheritance · Paper 1 — Free Biology SL Practice Questions

1FoundationMCQMendelian inheritance1 markPaper 1~2 min
In pea plants, tall stems (T) are dominant over short stems (t). A gardener crosses two heterozygous tall plants. What proportion of the offspring is expected to have tall stems?
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Solutions

2MasteryMCQMendelian inheritance1 markPaper 1~2 min
In pea plants, round seeds (R) are dominant over wrinkled seeds (r). A heterozygous round-seeded plant is crossed with a wrinkled-seeded plant. What proportion of the offspring is expected to have wrinkled seeds?
diagram

Solutions

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