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JAMB Biology 2024 Paper

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Question : 77

Total: 117

Use the diagram above to answer the question that follows

What is the genotypic ratio of the offspring produced in F $_1$ generation?

2:1:1
1:2:1
2:2
3:1

Solution:

Since offsprings for F $_1$ are AA AS AS SS

Phenotypic ratio : 3: 1

Genotypic ratio : 1 AA : 2 AS : 1 SS ⇒ 1: 2: 1

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