Agriculture Reference
In-Depth Information
If we break them apart we can see this clearly.
SS
S
S
(Snap)
s
s
ss
Again, we know that if two heterozygous parents are crossed that the
ratios will be 50/50 with regards to the allele.
Now remember Equilibrium? Where we consider a population
with a gene pool that has the sum of all the alleles equal to 100%, but
we may have different ratios? Such as 80% have S and 20% have s or
60% have S and 40% have s. Well maybe we should look at where
these laws collapse and where they fail to work as expected.
There are five reasons when the law of equilibrium fails to work.
These are:
1.
Mutation
2.
Gene migration
3.
Genetic drift
4.
Non-random mating
5.
Natural selection
Let us go through each one.
