Topics: Animal Genetics & Breeding, Animal Refresher

Inbreeding Coefficient vs. Coefficient of Relationship

The value of the inbreeding coefficient is always ______ of the coefficient of relationship.

2 times
Half
Square root
4 times

Inbreeding Coefficient vs. Coefficient of Relationship

The value of the inbreeding coefficient is always ______ of the coefficient of relationship.

Options

2 times
Half ✓
Square root
4 times

Correct Answer: B

Explanation in English

Correct Answer: Half

From Table 3 in the notes: Inbreeding coefficient (Fx) = ½ × Coefficient of Relationship (Rxy). The inbreeding coefficient is always half the coefficient of relationship.

Verification from Table 3

Mating	Rxy	Fx (= ½ Rxy)
Parent-offspring / Full-sib	0.50	0.25 ✔
Half-sib / Grandparent-grandoffspring	0.25	0.125 ✔
Single first cousin	0.125	0.0625 ✔

Why This Relationship?

The coefficient of relationship measures the probability that alleles in two individuals are identical by descent (IBD), while the inbreeding coefficient measures the probability that the two alleles in ONE individual are IBD — which is exactly half the pairwise probability.

📚 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.

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