Under the hardy-Weinberg principle, there is no selection,
no mutations, no migration, no chance of events and individuals choices to show
that evolution does not occur. You can
use the hardy-Weinberg equation to see if a population is evolving along with
seeing if the population is inbreeding. If
the population is not evolving, the numbers that are calculated from the equation
should come out to be around the same numbers.
When a huge change in the numbers occurs, this indicates that evolution
is occurring. Under the hardy-Weinberg
principle, we need to consider if all populations mate at random. Most people would just think that all
populations mate randomly. However,
there are some populations that breed asexually. When you have populations that self-fertilize,
you have what is called inbreeding or breeding among relatives. In interbreeding, you will see a large amount
of Homozygotes within the population. By
using the hardy-Weinberg equation, you could detect if inbreeding is occurring in
nature. We know that selection occurs when individuals of a certain phenotypes
survive and reproduces at higher rates than individuals of other phenotypes. Mutations occur when there is a change in
the codon of amino acids in the DNA. In
many cases, the mutation is silent or slightly harmful. Silent mutations have no effect on the DNA sequence
or phenotype. This occurs because if the
change is with the third codon there is no change with the amino acid and
genetic code. Mutations alone are not
enough to cause evolution, but along with a selective force over time can cause
evolutionary change. This is seen in the
research that is being done with the HIV virus. Studying the HIV virus has help
see evolution occurring and mutation rate within the population. http://vir.sgmjournals.org/content/79/6/1337.full.pdf
Show the HIV mutation rate and its role
in genetic variation.
http://scienceray.com/biology/botany/self-pollination-vs-cross-pollination/
shows self-fertilization.
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