13. Mendelian Genetics

To identify the genotype of a yellow-seeded pea plant as either homozygous dominant (YY) or heterozygous (Yy), you could do a test cross between your mystery plant and a plant with a genotype of _______. 

You want to determine the pea color genotype of a pea plant with yellow peas. You conduct a test cross with your mystery pea plant. The test cross results in 50% of the offspring possessing yellow peas and 50% of the offspring possessing green peas. What is the genotype for pea color of the mystery parent?

A single gene test cross is conducted to determine the genotype of a pea plant that shows the dominant phenotype for height (T = tall, t = short). If all offspring of the cross show the dominant phenotype, then the genotype of the unknown parent is _______.