Question:
The best method to expose lethal genes is ___________.
The best method to expose lethal genes is ___________.
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Inbreeding helps identify and eliminate harmful recessive genes from a population.
Updated On: Feb 9, 2026
- Outcrossing
- Inducing mutation
- Inbreeding
- Inducing heterozygosity
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The Correct Option is C
Solution and Explanation
Step 1: Understanding lethal genes.
Lethal genes are usually recessive and remain hidden in heterozygous condition. They express their effect only when present in the homozygous state.
Step 2: Role of inbreeding.
Inbreeding increases homozygosity in a population by mating closely related individuals. This increases the chance that recessive lethal genes become homozygous and get expressed.
Step 3: Analysis of options.
(A) Outcrossing: Incorrect — it increases heterozygosity and masks lethal genes.
(B) Inducing mutation: Incorrect — creates new mutations but does not specifically expose existing lethal genes.
(C) Inbreeding: Correct — it exposes recessive lethal genes by increasing homozygosity.
(D) Inducing heterozygosity: Incorrect — lethal genes remain hidden in heterozygous condition.
Step 4: Conclusion.
The best method to expose lethal genes is inbreeding.
Lethal genes are usually recessive and remain hidden in heterozygous condition. They express their effect only when present in the homozygous state.
Step 2: Role of inbreeding.
Inbreeding increases homozygosity in a population by mating closely related individuals. This increases the chance that recessive lethal genes become homozygous and get expressed.
Step 3: Analysis of options.
(A) Outcrossing: Incorrect — it increases heterozygosity and masks lethal genes.
(B) Inducing mutation: Incorrect — creates new mutations but does not specifically expose existing lethal genes.
(C) Inbreeding: Correct — it exposes recessive lethal genes by increasing homozygosity.
(D) Inducing heterozygosity: Incorrect — lethal genes remain hidden in heterozygous condition.
Step 4: Conclusion.
The best method to expose lethal genes is inbreeding.
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