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Home Q & A Board Biology-Related Homework Help General Biology
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Andrearcarter95 Andrearcarter95
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6 years ago
The persistence of the sickle-cell anemia allele in some African populations is the result of ____.
  a. a high rate of mutation of the normal allele to the sickle-cell anemia allele
  b. the advantage of the heterozygous form over the homozygous forms
  c. nonrandom mating
  d. a decline in the occurrence of malaria in Africa
  e. genetic drift

Question 2

Two or more alleles of a gene present at relatively high frequencies in a populations gene pool is known as ____.
  a. disruptive selection
  b. sexual dimorphism
  c. directional selection
  d. stabilizing selection
  e. balanced polymorphism
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npandelos1npandelos1
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6 years ago
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6 years ago
Thank you, thank you, thank you!
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