In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the…
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?
bb
Bb
$\mathrm{BB} / \mathrm{Bb}$
$B B$
Solution
To determine the genotype of a black seed colour at $F_2$, the black seed from $F_2$ is crossed with the white seed colour. This is called a test cross.
$\therefore$ To determine the genotype of $(\mathrm{BB} / \mathrm{Bb})$ black seed we need to cross them with white seed i.e. bb.