testcross

American

[test-kraws, -kros] / ˈtɛstˌkrɔs, -ˌkrɒs /

noun

a genetic test for heterozygosity in which an organism of dominant phenotype, but unknown genotype, is crossed to an organism recessive for all markers in question.

First recorded in 1930–35; test ¹ + cross

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023