The reason why Bb is golden and not silver
is because B dominates b.
Most phenotypes are observed
characteristics but some things like bud taste
are also phenotypes that can not be observed.
If we look at a Mostly Sativa species like a
Haze plant we will notice that it is pale
green. Now in a population of Haze plants we
may notice that the one or two out of one
hundred maybe dark green and not pale green.
This suggests that the pale green colour is
recessive. We are not totally sure until we
have completed the test but the gene
frequencies suggest this. We may also notice
that the bud is golden on most of the plants so
this suggests that the golden bud colour is a
dominant trait. Some of the buds on only a few
of the plants may be silver. This suggests that
silver trait is Recessive (bb in our example).
We know that the only genotype that
produces the recessive trait is homozygous
recessive (bb). So if a plant shows a recessive
trait in its phenotype, its genotype is
probably homozygous recessive.
A plant with a recessive trait always has a
homozygous recessive genotype.
