Cause of Permanent Genetic Correlation
Permanent genetic correlation between traits is due to-
- Pleiotropy — Correct Answer
- Linkage
- Heterozygosity
- All the above
Explanation:
Correct Answer: Pleiotropy
Pleiotropy is the permanent cause of genetic correlation because a single gene permanently affects multiple traits simultaneously. This correlation persists across all generations.
Pleiotropy — Examples
- Sickle cell anemia gene in human (pleiotropic gene)
- Halothane gene in pigs
- Double muscling gene in cattle
Causes of Genetic Correlation Comparison
| Cause | Permanence | Mechanism |
|---|---|---|
| Pleiotropy | Permanent | One gene → multiple phenotypic effects |
| Linkage | Transient/Temporary | Genes physically close on chromosome; broken up by recombination over generations |
- Pleiotropic gene: a single gene that controls more than one trait.
- Linkage breaks up over generations due to crossing over, making the correlation transient.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
