Agriculture Reference
In-Depth Information
If one of the parents were MM and the other Mm we would
have ended up with a 50/50 population of both variations. But one
group is clearly homozygous (MM) and the other is heterozygous
(Mm).
If both where Mm then we would have 25% MM, 50% Mm
and 25% mm.
Even though we can see the frequencies we still do not know
if the Pale green leaf trait is Dominant or Recessive, but we can find
this out by performing A Test Cross.
Now we are not going to go through the Test Cross chapter
again but we can show you how to isolate the genotype that you need,
which is either MM or mm because we want to breed that trait true.
We must also keep track of the parent plants being used here.
To keep parent plants alive, clone them! The exact same
genetic material will be passed on from clone to clone.
In this this cross do you see MM offspring and the mm
offspring? Well by their very nature they can not be the same. By
