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Table 1.
ERIC (Education Resources Information Center, http://eric.ed.gov/) search about key evolutionary processes, performed on May 2, 2015. Search results overestimate the number of relevant articles, because they were not analyzed to determine how the topic was addressed or how instruction on the topic was recommended. Categories may overlap; N = 1075 articles.
Search TermNumber of Articles FoundPercentage of Total Articles
Natural selection 1016 95 
Genetic drift 22 
Evo-devo 0.6 
Dominant gene (or allele)a 33 (14)b 3 (1) 
Search TermNumber of Articles FoundPercentage of Total Articles
Natural selection 1016 95 
Genetic drift 22 
Evo-devo 0.6 
Dominant gene (or allele)a 33 (14)b 3 (1) 
a

Note that dominant allele is a more accurate description of the dominance relationship among alleles than dominant gene, despite the fact that instructional materials and the general media often refer to dominant and recessive genes (Abraham et al., 2014). We include the phrase dominant gene here because it recovered more articles than the phrase dominant allele.

b

Four articles include both dominant gene and dominant allele.

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