DNA timeline?

Question

Can anyone give me a DNA timeline in a nutshell? I mean the basic "what was really important and how it leads into the next discovery?" I am tutoring my young nephew and he is interested in this field. I would like to give him the basics, but also how they interact to the next event or even the one before so its not just names, dates, etc. and he can ask questions. No advertisments or stupid answers PLEASE!!!

Answer 1

Homo Sapiens...About 200,000 years ago, to the Present.

Cro-Magnon...40-10,000 years ago, primarily in Europe.

Neanderthal...250-25,000 years ago.

Homo Erectus, possibly 500,000 years old.

Non-Human DNA...All animals can be traced to the ocean sponge, nearly one billion years old.

Plants first came to life 2.5 billion years ago, at the bottom of the oceans, near geo-thermal vents, which emitted hot gases into the ocean water...

Earth = 4.6 billion years old!

Answer 2

Here are a couple of web sites that might help

http://library.thinkquest.org/20465/info...

http://scq.ubc.ca/textbook/molbio.html