27. Which of the following statements best explains the prevalence and geographic distribution of sickle cell anemia allele (HbS). The homozygotes for normal hemoglobin protein are always at an advantage in all environments. Homozygous recessive individuals are selected for in malarial environments. Heterozygous individuals are at a selective advantage in malarial environments. Sickle cell anemia is found in high frequencies only among West Africans and their descendants. none of the above.
27. Which of the following statements best explains the prevalence and geographic distribution of sickle cell anemia allele (HbS). The homozygotes for normal hemoglobin protein are always at an advantage in all environments. Homozygous recessive individuals are selected for in malarial environments. Heterozygous individuals are at a selective advantage in malarial environments. Sickle cell anemia is found in high frequencies only among West Africans and their descendants. none of the above.
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN:9781305073951
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter13: Observing Patterns In Inherited Traits
Section: Chapter Questions
Problem 11GP: A single allele gives rise to the Hbs form of hemoglobin. Individuals who are homozygous for the...
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27. Which of the following statements best explains the prevalence and geographic distribution of sickle cell anemia allele (HbS).
|
The homozygotes for normal hemoglobin protein are always at an advantage in all environments. |
|
Homozygous recessive individuals are selected for in malarial environments. |
|
Heterozygous individuals are at a selective advantage in malarial environments. |
|
Sickle cell anemia is found in high frequencies only among West Africans and their descendants. |
|
none of the above. |
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