Question:
A cross between an F1 hybrid and one of its parental genotypes is called
A cross between an F1 hybrid and one of its parental genotypes is called
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All test crosses are back crosses, but not all back crosses are test crosses!
Updated On: Jul 9, 2026
- \( \text{Back cross} \)
- \( \text{Dihybrid cross} \)
- \( \text{Test cross} \)
- \( \text{Monohybrid cross} \)
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The Correct Option is A
Solution and Explanation
Concept:
In genetics, specific terminology is used to describe different types of breeding experiments based on the generation of the parents.
• The F1 (first filial) generation is the offspring of the initial parental (P) cross.
• Crossing an F1 individual with an older generation serves different analytical purposes.
Step 1: Defining the Back Cross.
A back cross is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent. The objective is to achieve offspring with a genetic identity which is closer to that of the parent.
Step 2: Distinguishing from a Test Cross.
A test cross is a specific type of back cross where the F1 hybrid is crossed specifically with the homozygous recessive parent. Since the question specifies "one of its parental genotypes" (either dominant or recessive), "Back cross" is the more general and accurate term. Final Answer: The cross between an F1 hybrid and a parental genotype is a Back cross.
• The F1 (first filial) generation is the offspring of the initial parental (P) cross.
• Crossing an F1 individual with an older generation serves different analytical purposes.
Step 1: Defining the Back Cross.
A back cross is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent. The objective is to achieve offspring with a genetic identity which is closer to that of the parent.
Step 2: Distinguishing from a Test Cross.
A test cross is a specific type of back cross where the F1 hybrid is crossed specifically with the homozygous recessive parent. Since the question specifies "one of its parental genotypes" (either dominant or recessive), "Back cross" is the more general and accurate term. Final Answer: The cross between an F1 hybrid and a parental genotype is a Back cross.
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