Mendel performed a testcross with his plants and all the resulting progeny had the same colour. What information did this testcross provide?

Question

Quizplus · Accepted Answer

When all progeny from a testcross display the same trait, it indicates that the parent with the dominant trait must be homozygous. This is because a homozygous dominant parent can only pass on alleles for the dominant trait, resulting in offspring that all show the dominant phenotype.

Mendel Performed a Testcross with His Plants and All the Resulting