John has two sisters and two brothers. Three of the five children in the family have dark brown hair, one has red hair, and one has light brown hair. The variation in hair color is due to the input of multiple genes. What pattern of inheritance is exhibited here? A) Polygenetic inheritance B) Co-dominance C)Pleiotropy

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John has two sisters and two brothers. Three of the five children in the family have dark brown hair, one has red hair, and one has light brown hair. The variation in hair color is due to the input of multiple genes. What pattern of inheritance is exhibited here? A) Polygenetic inheritance B) Co-dominance C)Pleiotropy

Biology
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Pleiotropy is not the answer because it involves one gene influencing multiple phenotypical traits. Co-dominance is also not right because it involves genes of only one locus, and it says in the question that "The variation in hair colour is due to multiple genes" The answer is A) polygenetic inheritance because multiple genes influence one phenotypical trait (hair colour).
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