Resemblance Between Relatives: Basis For

Correct Answer: Both Heritability and Genetic Correlation

From the notes: 'Resemblance between relatives' is the basis of estimation of both heritability and genetic correlation.

Heritability Estimation Methods (from Table 13 in notes)

• Offspring–one parent regression: Covariance = ½VA; h² = 2b
• Offspring–mid parent regression: Covariance = ½VA; h² = b
• Half-sib correlation: Covariance = ¼VA; h² = 4t — Best method, relatively free from biases
• Full-sib correlation: Covariance = ½VA + ¼VD + VEC; h² = 2t — Least reliable (includes dominance and common environment)

Key Note

The chief determiner of resemblance between relatives is additive gene action.