Causes of Genetic Correlation
Genetic correlation between traits is due to:
- Pleiotropy
- Linkage
- Heterozygosity
- Both a & b — Correct Answer
Explanation:
Correct Answer: Both a & b (Pleiotropy and Linkage)
Genetic correlation between traits is caused by both Pleiotropy and Linkage:
- Pleiotropy: A single gene affecting multiple traits — permanent cause of genetic correlation.
- Linkage: Genes located close together on the same chromosome — transient/temporary cause.
Causes of Genetic Correlation
| Cause | Type | Permanence |
|---|---|---|
| Pleiotropy | One gene → multiple traits | Permanent |
| Linkage | Genes on same chromosome | Temporary/Transient |
| Heterozygosity | Minor cause | — |
Types of Correlation
- Phenotypic correlation
- Genetic correlation
- Environmental correlation
Examples
- Positive correlation: Milk yield & fat yield; Egg size & egg weight
- Negative correlation: Milk yield & fat%; Number of eggs & size of eggs
- No correlation: Milk yield & horn length
📚 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.
