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What is the relatedness coefficient between half cousins (i.e., cousins who share only one grandparent)? Please...

What is the relatedness coefficient between half cousins (i.e., cousins who share only one grandparent)? Please provide your answer to four decimal places (e.g., 0.xxxx).

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Answer #1

In diploid organisms, each child receives half of its genes from its mother and half from its father. Therefore, each parent shares half its alleles with a child. The parents and offspring are related by r=1/2 (coefficient of relatedness). Any two siblings are also related by 1/2. Each sibling receives half its genes from each parent.

In the given scenario where the coefficient of relatedness is calculated between half cousins who share only one grandparent :

Therefore, the coefficient of relatedness is 0.0625 between half cousins ( using formula: number of steps (n), r = (1/2) ^ n, where n= degree of relation or number of steps between the family member). Therefore, r= (1/2)^4= 1/16.

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