Heritability Calculation from Half-Sib Correlation
If correlation coefficient of half sibs (t) is 0.2, then heritability of the trait is:
- 0.2
- 0.4
- 0.8 — Correct Answer
- 0.05
Explanation:
Correct Answer: 0.8
For half sibs: h² = 4t
h² = 4 × 0.2 = 0.8
Heritability Formulae from Relative Correlations
| Relatives | Covariance | Formula |
|---|---|---|
| Offspring and one parent | ½ VA | h² = 2b (where b = regression) |
| Offspring and mid parent | ½ VA | h² = b |
| Half sibs | ¼ VA | h² = 4t (where t = intraclass correlation) |
| Full sibs | ½ VA + ¼ VD + VEC | h² = 2t |
Verify: Full sib correlation of 0.2 → h² = 2 × 0.2 = 0.4 (not 0.8).
📚 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.
