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Unformatted text preview: or decrease (they change in one direction) depending on environmental circumstances and the selective pressures involved. Sickle-Cell anemia • A severe inherited hemoglobin disorder in which red blood cells collapse when deprived of oxygen. • It results from inheriting two copies of a mutant allele. • This mutation is caused by a single base substitution in the DNA....
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This note was uploaded on 02/07/2012 for the course DRAMA 100 taught by Professor Gihan during the Spring '11 term at Miramar College.
- Spring '11