Three-point testcross - An Introduction to Genetic ...
So far, we have looked at linkage in crosses of double heterozygotes to doubly recessive testers. The next level of complexity is a cross of a triple heterozygote to a triply recessive tester. This kind of cross, called a three-point testcross, illustrates the standard approach used in linkage analysis. We shall consider two examples of such crosses here.
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