Download Variation and Evolution

Variation and Cloning
1. Variation may be due to genetic or
environmental factors or a
combination of both
2. Selective breeding can produce
individuals with a desired
characteristic
3. Animals and plants can be cloned
4. Genes from the DNA of one organism
can be inserted into the DNA of
another organism
Variation
Selective breeding
Selective breeding
Cloning of plants
Cloning of animals
Genetic Engineering
Genetic Engineering
Genetic Engineering
Mutations
1. The sequence of DNA may be changed
by radiation or mistakes in replication
2. The mutated DNA could cause a new
characteristic to be seen. More often
the mutation leads to genetic problems
or death
Mutations
DNA replication
Mutations
Cancer
Evolution and Fossils
1. Some organisms are more suited to
their environment than others. They
survive and pass their genes onto the
next generation. Those less suited may
die and not pass on their genes. This is
called natural selection.
2. Evolution is the theory that all
organisms have evolved from simple
life-forms over billions of years
3. The fossil record gives evidence for
evolution
Natural Selection
Survival of the fittest
Evolution
Natural Selection
Fossil formation
Fossil formation
Fossil record