The Test Cross Some may ask the question: "How do I know if a trait such as bud color is homozygous dominant (BB), heterozygous (Bb) or homozygous recessive (bb)?" If you've been given seeds or a clone you may have been told that a trait such as potencyis homozygous dominant, heterozygous or homozygous recessive. However you will want to discover this for yourself, especially if you intend to use thoise specific traits in a future breeding plan. To do this, you will need to perform what is called a test cross. Determining phenotype of a plant is fairly straightforward. You look at the plant and you see, smell, feel or taste its phenotype. Determining the genotype cannot be achieved through simple observation alone. continued..... |