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is this statement correct To inherit the disease, the child only needs 1 copy of the defective to show disease symptoms, which would be 50%. If only one parent contains a single copy (heterozygous) of a dominantly inherited disorder and the other parent is homozygous recessive, what percentage of offspring will have the disorder

Question

is this statement correct To inherit the disease, the child only needs 1 copy of the defective to show disease symptoms, which would be 50%. If only one parent contains a single copy (heterozygous) of a dominantly inherited disorder and the other parent is homozygous recessive, what percentage of offspring will have the disorder

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Solution

The statement is correct. In a dominantly inherited disorder, only one copy of the defective gene is needed for the disease to be expressed. If one parent is heterozygous (meaning they have one copy of the defective gene and one normal gene) and the other parent is homozygous recessive (meaning they have two normal genes), then there is a 50% chance that the offspring will inherit the disorder. This is because the heterozygous parent can pass on either the defective gene or the normal gene. If the defective gene is passed on, the child will have the disorder. If the normal gene is passed on, the child will not have the disorder. Therefore, the percentage of offspring that will have the disorder is 50%.

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