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

If all the progeny have the dominant trait, it means that the parent with the dominant trait must have been homozygous. A heterozygous parent would have produced some progeny with the recessive trait. Therefore, by process of elimination, the parent with the recessive trait must be heterozygous.

Mendel Performed a Testcross with His Plants and All the Resulting