With Respect to the Alleles for Sickle Cell Anemia, Which

question 51

Multiple Choice

With respect to the alleles for sickle cell anemia, which genotype(s) is (are) at a disadvantage to persons residing in tropical areas of Africa?

• A) Heterozygous
• B) Homozygous dominant
• C) Homozygous recessive
• D) Both heterozygous and homozygous dominant
• E) Both homozygous dominant and homozygous recessive

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Definitions:

Nematocysts

Specialized cells in cnidarians, such as jellyfish, that eject a stinging thread for capturing prey or defense.

Cnidarian

Radially symmetrical invertebrate with two tissue layers; uses tentacles with stinging cells to capture food.

Cnidocyte

Stinging cell unique to cnidarians.

Polyps

Abnormal growths of tissue projecting from a mucous membrane, commonly found in organs such as the nose or intestines.