Mathematical Range of Genetic Parameters
Range of heritability, repeatability & fitness of a trait is-
- -1 to +1
- 0 to +1 — Correct Answer
- More than 1
- None
Explanation:
Correct Answer: 0 to +1
Heritability (h²), Repeatability (r), and Fitness (F) are all proportions or probability-based parameters — they can never be negative and can never exceed 1. Their range is always 0 to +1 (or 0% to 100%).
Range of Key Genetic Parameters
| Parameter | Range | Notes |
|---|---|---|
| Heritability (h²) | 0 to 1 | 0 = trait entirely environmental; 1 = trait entirely genetic |
| Repeatability (r) | 0 to 1 | r ≥ h² always; repeatability is the upper limit of heritability |
| Fitness / Adaptive value (F) | 0 to 1 | F = 1 − S; S = coefficient of selection; F = 0 means lethal; F = 1 means neutral to selection |
Contrast — Parameters with Different Ranges
| Parameter | Range |
|---|---|
| Correlation coefficient (r) | −1 to +1 |
| Regression coefficient (b) | −∞ to +∞ |
| Heritability, Repeatability, Fitness | 0 to +1 only |
📚 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.
