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3 October, 05:18

A woman with severe discoloration of her tooth enamel has four children with a man who has normal tooth enamel. Two of the children, a boy (Bob) and a girl (Gladys) have discolored teeth. Each has a mate with normal tooth enamel and produces several children. Gladys has 6 children, four boys and two girls. Two of her boys and one of her girls have discolored enamel. Bob has seven children, four girls and three boys. All four of his daughters have discolored enamel, but all his boys have normal enamel.

a. Draw the pedigree for this family, indicating which individuals are affected with discolored enamel.

b. Explain the inheritance of this condition.

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  1. 3 October, 07:34
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    Mother (with severe discoloration of tooth enamel) - -> bob and Gladys.

    From bob - -> 4 daughters.

    From Gladys - -> 2 boys and 1 girl.

    Explanation:

    Mother with severe discoloration of tooth enamel transferred this trait to her offspring i. e. bob and Gladys. From bob, this trait is transferred to his 4 daughters while Gladys has 2 boys and 1 girl has this type of tooth enamel. This discoloration of tooth enamel comes from the women to their children and this characteristics is transferred from one generation to another generation.
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