In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?

Step-by-step solution

To determine the genotype of a black seed colour at F₂ , the black seed from F₂ is crossed with the white seed colour. This is called a test cross. To determine the genotype of ( BB / Bb ) black seed we need to cross them with white seed i.e. bb.