PSY352H5 Lecture Notes - Lecture 2: Allele, Drug Resistance

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Published on 16 Sep 2015
School
UTM
Department
Psychology
Course
PSY352H5
Professor
Friday, January 17, 2014
Animal Psychology: Lecture 2
CHARLES DARWIN’S THEORY OF EVOLUTION
-Charles Darwin was first who observed and recorded animal behaviour
-THEORY OF NATURAL SELECTION: purpose of randomness vs. purpose of design.
When you look at organism it seems some really good engineer designed them, it
seems there is purpose because organism function properly of what they need.
Charles Darwin found out that it is a result of millions and billions of years of natural
selection. Some variations are better in producing other organisms, one that is best
will survive and send genes to the next generation. This is randomness created by
complete purpose. Organisms around us are created by random natural selection,
where learning on mistakes and reproducing best variations possible.
-TIME! unimaginable stretch of time is the key. Random selection -> evolution. Those
who enjoy advantage reproduce more babies, they will survive better and will be in
large numbers in the next generation. As we can see some features becoming more
and more and other features are disappearing. BUT what happens during thousands
of years? change, and that’s why the time is the key. Changes by time can lead to
even total change of an organism. In Darwin’s time it was really crazy that we could
solve from something as small as mouse BUT this happen in hundreds and millions of
years what people cannot even imagine, that’s why it sounds so crazy. But now we
have some proofs. If there is so much time -> so much changes can happen. Age of
universe is 13.8 billions of years, BUT life on earth only 3.5 billion years ago, that time
only the basic microorganisms.
-DNA! All organisms have DNA, function of DNA -> ability to have and reproduce
information. Idea is that all life evolved from one thing. The proof for it is that every
organism uses the same genetic code, it means that the sequence of genes. Every
organism has same genetic code - amino acids have universal code. UNIVERSALITY
OF GENETIC CODE= proof that all organisms evolve from one thing.
-Darwin understood by looking at finches that all living things are related, all living
things on Earth are part of a single tree of life.
-Population of some ants that look like leaf, those who look more like leaf have better
chance of survival, they are less likely to be caught be predator -> so will be more
likely to produce offsprings and send the same genes to the next generation. This is
how the process of natural selection works,even tiny changes can make a difference.
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Document Summary

Charles darwin was rst who observed and recorded animal behaviour. Theory of natural selection: purpose of randomness vs. purpose of design. When you look at organism it seems some really good engineer designed them, it seems there is purpose because organism function properly of what they need. Charles darwin found out that it is a result of millions and billions of years of natural selection. Some variations are better in producing other organisms, one that is best will survive and send genes to the next generation. Organisms around us are created by random natural selection, where learning on mistakes and reproducing best variations possible. Time! unimaginable stretch of time is the key. Those who enjoy advantage reproduce more babies, they will survive better and will be in large numbers in the next generation. As we can see some features becoming more and more and other features are disappearing.

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