Question

The probability of inheritance of a particular allele from a parent or ancestor by the two related organisms is known as the coefficient of relatedness. Full siblings will show the coefficient of relatedness of about

• A. $0.10$
• B. $0.25$
• C. $0.50$
• D. $0.75$
• E. $1.00$

Answer 1

The correct option is C $0.50$

Coefficient of relatedness is the measure of the degree of consanguinity between two individuals. Denoted by 'r' this is the key parameter in understanding kin selection and shows the probability that homologous individuals are identical by descent. While identical twins have 100% coefficient of relatedness, relation between full siblings show 50% and so does parent-offspring relation.