Test Cross
A test cross helps in determining:
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About This Question
- Subject
- biology
- Chapter
- principles of inheritance and variation
- Topic
- test cross
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Genotype of organism with dominant phenotype
- Definition: A test cross is a way to determine the genotype of an individual with a dominant phenotype.
- Mechanism: The organism with the dominant phenotype (and unknown genotype) is crossed with a homozygous recessive parent.
- Result Analysis: If all offspring show the dominant phenotype, the unknown parent is homozygous dominant. If some show the recessive phenotype, the unknown is heterozygous.
- Conclusion: It determines the genotype of an organism showing a dominant phenotype.
This medium difficulty biology question is from the chapter principles of inheritance and variation, covering the topic of test cross. It appeared in the 2025 exam.
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