Calculation of Heritability in Narrow Sense
If VA = 20, VG = 30, and VP = 100, then heritability in the narrow sense (h²ɴ) is:
- 0.30
- 0.50
- 0.20 — Correct Answer
- 0.67
Explanation:
Correct Answer: 0.20
Heritability in narrow sense = VA / VP = 20 / 100 = 0.20
Note: Heritability in broad sense = VG / VP = 30 / 100 = 0.30
Heritability Formulae
- h²ɴ (narrow sense) = VA / VP = Additive genetic variance / Phenotypic variance
- H²ᴮ (broad sense) = VG / VP = Genotypic variance / Phenotypic variance
- h²ɴ ≤ H²ᴮ always
Variance Components
- VP = VG + VE
- VG = VA + VD + VI
- In this example: VE = VP − VG = 100 − 30 = 70
📚 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.
