Agriculture Reference
In-Depth Information
no other populations where introduced then the frequency of .42 would
be maintained generation after generation.
However we would like to point out that we used a very small
pool in the above example. If the pool were much larger then the
number of changes, even if one or two new genes jumped in, would be
insignificant. You could calculate it, but the change would be on an
extremely low level 0.000000000001 of a difference in reality.
This is just as basic example to get you started. It may not
make complete sense at first but if you read on then it will fall into
place. Some of you may be asking the question.
How do I know if a trait, such as bud color is Homozygous Dominant
(BB), or Heterozygous (Bb) or Homozygous Recessive, (bb)?
If you have been given seeds or a clone you may have been
told that a trait, such potency is Homozygous Dominant, Heterozygous
or Homozygous Recessive. However, you will want to prove this to
yourself. Especially if you are going to use that plant in a future
breeding plan. You will have to do what is called a Test Cross.
THE TEST CROSS
Determining the phenotype of a plant is fairly
straightforward. You look at the plant and you see its phenotype.
Determining the genotype can not be done through visible observation
alone. The genes themselves are somewhat hidden except for their
visible related phenotypes.
Again there are three possible genotypes that the plant can
create. Let's say golden bud is dominant and silver bud is recessive.
Search WWH ::




Custom Search