All the offspring will be MM and thus true
breeding for that trait. Those offspring are
the results of squaring. We have not really
cubed anything here, but this is a good example
to get you started because it shows how we can
manipulate a population by backcrossing.Cubing in reality is less controlled than
this. Cubing is a way of increasing the
frequency in a population for a certain trait.
It MAY not result in true breeding but it will
promote a trait in a bunch of plants. Also the
actual selection process is somewhat random.In a population we select a mother plant
that we want to keep because of her features.
In the same population we gather pollen from
50% of the males that have characteristics
similar to the mother plant and 50% that do
not. The pollen is mixed is their respective
portions. So we have two packets of pollen in
the end. We must clone the female to create 2
females. We then use the 2 packets of pollen on
each clone separately.(^) M M
M MM MM
M MM MM