CourseCourseConceptConceptDocsDocuments

IB Biology HL D3.2.3 Genotype Questions

Identify genotype allele combinations and classify matching or different alleles as homozygous or heterozygous in IB Biology HL D3.2.3.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify a genotype as an allele combination and classify a specified combination as homozygous or heterozygous when the alleles match or differ.

Learn this topic

Study D3.2.3—Genotype conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D3.2.3 Genotype Questions question 1

[Maximum number: 1]

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 genotypes of the soybean plants with high oil content and four seeds in a pod that were used in the cross.

All question bank results loaded