Usage History of 'heterozygous'

The following chart shows how frequently 'heterozygous' appeared in printed materials over time. For example, the word 'heterozygous' occurred 2 times in books in 1857 and 24,243 times in 2008. From 1857 to 2008, the word 'heterozygous' was used a total of 825,876 times in books scanned by Google. See Reference: Google Ngram project.

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