IB Biology HL D3.2.4 Phenotype Questions

Match each outcome in a stated phenotypic ratio to its named observable trait in IB Biology HL D3.2.4.

Exam points

Identify the observable phenotype represented by each part of a stated phenotypic ratio, matching each ratio outcome to its named trait.

[Maximum number: 2]

In a strain of soybeans, high oil content (H) in seeds is dominant to low oil content (h) and four seeds in a pod (F) is dominant to two seeds in a pod (f). A farmer crosses two soybean plants, both with high oil content and four seeds in a pod. The offspring have a phenotypic ratio of 9: 3: 3: 1.

Identify the phenotypes of each part of the phenotypic ratio.

Table for Question IB Biology HL D3.2.4 Phenotype Questions question 1 — IB Biology HL

ratio	phenotypes
9	high oil four seeds;
3	high oil two seeds;
3	low oil four seeds;
1	low oil two seeds;

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IB Biology HL D3.2.4 Phenotype Questions question 1