Answer: they retain in the brain
Explanation: they stay time after time
Hereditary Diseases are passed on from one generation to another through defective genes. These diseases are transmitted in the same family. The chromosomes in the humans are responsible for passing the traits from the parent to the offspring.
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That is called Hypoxemia. Hypoxemia<span>s a sign of a problem related to breathing or circulation, and may result in various symptoms, such as shortness of breath.</span>
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B) Frequency of infectious illnesses usually increases as children grow older.