________ is demonstrated by the example that the heterozygote HbS HbA, one sickle-cell allele and one normal one, was maintained in some populations as the fittest phenotype for a malarial environment
A. Mutation
B. Genetic drift
C. Phenotypical adaptation
D. Recombination
E. Balanced polymorphism
E
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Which of the following is a prediction of the Multiregional Model for the origins of modern humans?
a. There was a single evolving lineage of H. sapiens in each region of the Old World. b. Regional H. erectus characteristics were replaced by those of H. neanderthalensis. c. There was an abrupt separation of H. erectus and H. sapiens populations. d. H. neanderthalensis did not interbreed with anatomically modern H. sapiens.
Shaker communities accepted which of these?
a) Second Coming of Christ was anticipated imminently. b) Men and women were equal. c) Private property was valued. d) People should “be fruitful and multiply.”
The domestication of __________ was the first step in the transition to the Neolithic in Africa
A) cattle B) wheat C) millet D) goats
New alleles are always the results of mutations
a. True b. False Indicate whether the statement is true or false