In 1809, Jean Baptiste Lamarck had a
hypothesis about the inheritance of acquired traits. He thought that by the
selective use or disuse of organs, organisms could acquire or lose certain
traits during their lifetime. But Richard Dawkins clearly disagrees with this
idea. “Genes do indirectly control the manufacture of bodies, but the influence
is strictly one way: acquired characteristics are not inherited.” (pg.23). Imagine if we could pass our traits on to our
children. Although it would be interesting, it would also be chaotic. We would
have a way of controlling evolution. If we want our offspring to be really fit,
we could work hard at the gym to become strong. This acquired trait would be
passed on to your future generations.
But this idea would not always be good. Imagine you were in an accident and
lost an arm. Your children would also be born without an arm. But thankfully,
“Each new generation starts from scratch.”(pg.23).
miércoles, 16 de mayo de 2012
Genes Are Selfish, Are We?
martes, 8 de mayo de 2012
Nothing
“In the
beginning was simplicity. It is difficult enough explaining how even a simple
universe began. I take it as agreed that it would be even harder to explain the
sudden springing up, fully armed, of complex order-life, or a being capable of
creating life.”-pg. 12
When I started reading this book, all sorts of questions about existence popped into my mind. Why are we alive? How is it possible that simple molecules formed a human being? where did these molecules even come from? Ever since
I was a child I have wondered about the origin of everything we know. I would
always ask my father about what there was before the universe. He would simply
tell me, there was nothing there. I was (and still am) intrigued by the thought of
nothing. What is nothing? At first I would relate the concept to a huge open
space submerged in darkness. But then I realized darkness is something, so that
couldn’t be. I guess nothing would be
complete transparency. No colors, nothing at all. But for a moment try to picture this in your
mind. What was there before there even was a universe? I find it impossible to picture.
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