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testcross

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

noun

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

Etymology

Origin of testcross

First recorded in 1930–35; test 1 + cross

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.