Examlex
Which of the following types of malignant tumors have the poorest survival rate?
Down's Syndrome
A genetic disorder caused by the presence of an extra chromosome 21, characterized by physical growth delays and mild to moderate intellectual disability.
Sickle-cell Anemia
A genetic blood disorder characterized by red blood cells assuming an abnormal, rigid, sickle shape, leading to various health complications.
African Americans
A racial or ethnic group in the United States with ancestry from any of the Black racial groups of Africa.
Carrier
An individual or entity that transports or conveys substances, signals, or conditions. In genetics, it refers to someone who has one copy of a gene mutation but does not exhibit disease symptoms.
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