All of the Following Statements About Sickle-Cell Anemia Are Correct

question 62

Multiple Choice

All of the following statements about sickle-cell anemia are correct except:

• A)it came to the attention of geneticists when it was observed that most North Americans who suffer from it are of African ancestry.
• B)it was traced to abnormalities in populations that live in a clearly defined belt across tropical Central Africa.
• C)it is notable in areas where high rates of deadly form of malaria is common.
• D)because it is a disease of adaptation,it can never be brought under control or eradicated.
• E)heterozygous individuals suffer few negative consequences except under stress or low oxygen.

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Definitions:

Callable Bond

A type of bond that can be redeemed by the issuer before its maturity date at a specified price.

Redemption

The process by which securities or financial instruments are converted into cash or its equivalent value.

Collar

A protective options strategy that involves buying a put option and selling a call option on the same asset to limit the range of possible returns.

Putable Bond

A type of bond that allows the holder to sell the bond back to the issuer at a predetermined price before maturity.