Download 110586_Natural_Selection

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project

Document related concepts

Genome evolution wikipedia , lookup

Site-specific recombinase technology wikipedia , lookup

Gene nomenclature wikipedia , lookup

Saethre–Chotzen syndrome wikipedia , lookup

Therapeutic gene modulation wikipedia , lookup

Human genetic variation wikipedia , lookup

Heritability of IQ wikipedia , lookup

Polymorphism (biology) wikipedia , lookup

Artificial gene synthesis wikipedia , lookup

Gene expression profiling wikipedia , lookup

Nutriepigenomics wikipedia , lookup

The Selfish Gene wikipedia , lookup

Population genetics wikipedia , lookup

Designer baby wikipedia , lookup

Gene expression programming wikipedia , lookup

Biology and consumer behaviour wikipedia , lookup

Koinophilia wikipedia , lookup

Microevolution wikipedia , lookup

Transcript
Natural Selection
Darwin’s 4 Main Postulates
1. Individuals, even siblings, in a
population vary (there is variation)
2. These variations can be passed
to offspring (are inherited)
Darwin’s 4 Main Postulates
3. More offspring are produced
than the environment can support,
so there is competition for
resources (from Malthus)
4. Those individuals whose
characteristics make them best
suited to the environment (fitness)
live and reproduce and have more
offspring
(survival of the fittest).
Darwin’s Finches
Individuals do not evolve,
populations evolve!
Evolution is change in the genes of
a population over time.
Both gene frequency (how
common a gene is) and gene
expression (whether it is turned on
or off) can change.
Journal Questions
#2 - If I had a third child and
he/she was born with seven
fingers, would that be an example
of evolution? If so, why? If not
necessarily, what would be
necessary for this to be considered
an example of evolution, and what
factors might influence this?
#3 - Thoughts/Reflections