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3 November, 18:40

Brown eyes is dominant to light eyes. Mr. O'Ryan has blue (light) eyes. Mrs. O'Ryan is heterozygous for brown eyes. What are the eye color possibilities of their son, Kellan O'Ryan? * Use letter B

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  1. 3 November, 19:04
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    Brown eyes = 0.5

    Blue eyes = 0.5

    Explanation:

    Given, B (brown eyes) is dominant over b (blue/light eyes). So,

    BB = Brown

    Bb = Brown

    bb = blue/light

    Mr. O'Ryan = blue eyes = bb

    Mrs. O'Ryan = heterozygous brown eyes = Bb

    Their children: Bb X bb:

    B b

    b Bb bb

    b Bb bb

    Half of the children will have Bb genotype and brown eyes, other half will have bb genotype and blue eyes. Hence, Kellan O'Ryan has 0.5 probability of blue eyes and 0.5 probability of brown eyes.
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