There is a human genetic disease called LHON. This disease is caused by a mutati

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Question

There is a human genetic disease called LHON. This disease is caused by a mutation in mitochondrial DNA, and causes loss of vision in early adulthood. True/false: In a cross between a woman with this disease and a normal man, an affected son would not be expected to pass on this disease to his offspring. The mitochondrial DNA present in the skeleton of Richard III would be expected to be identical to the mitochondrial DNA of his sister and ail the female descendents of that sister. You would expect your mitochondrial DNA to be identical to the mitochondrial DNA of your father's mother. Which of the following individuals (real or imaginary), would not have the same mitochondrial DNA as you? According to genetic studies from mitochondrial DNA, which of the following continents was inhabited most recently by modern-day humans?

Explanation / Answer

1. True

Since it is mitochondrially inherited disease it can only be passed from mother to her children. The son being a male will not be able to pass the disease.

2. True

Same amount of this DNA is shared by all siblings.

3. False

This DNA is passed only from mother to her children

4. d. your mother's father

Your mother received mitochondrial DNA from her mother and passed it to you.

5. e. Africa

The study found the African origins of modern humans.

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There is a human genetic disease called LHON. This disease is caused by a mutati

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