Yay Eaasy

Name: David Singh
Extra Credit Project
Forrest, Fall 2011
Anthro 102

Seeing in Color
Why can humans see in color while Pottos cannot?
Pottos are colorblind-they can't see the color red. Humans on the other hand have a full spectrum of color. Pottos are active at night, so being color blind is not a disadvantage for them.

Grasping hands
What makes human hands unique?
Humans have opposable thumbs that are longer, compared to finger length, than any other primate’s thumb. This gives humans a great advantage for grasping objects and throwing.

Why do spider monkeys have small thumbs?
It gives them an advantage when moving quickly through the trees; spider monkeys use their hands like hooks and swing from branch to branch.

Slow Life
Why did slow growth and long lives evolve in primates?
It gives young primates more time to learn complex social behaviors. It Allows the development of an abnormally large brain.

DNA: Comparing humans and chimps
If human and chimp DNA are 98.8% alike why are there still many differences between us?
Each human cell contains roughly three billion base pairs, or bits of information. Just 1.2 percent of that equals about 35 million differences. Some of these have a big impact, others don't. At the same time humans and bananas have over 50-60% of the same DNA.

DNA: A record of the past
How long ago did the last common ancestor between humans and chimps exist?
By comparing DNA sequences from humans and chimpanzees, experts calculated that the last human-chimp ancestor lived roughly six million years ago.

Why are Y chromosome and mitochondrial DNA useful for studying molecular relationships?
By studying patterns of mutations in mitochondrial DNA we can trace female ancestry. Scientists also use samples of Y-chromosome DNA to construct a lineage showing relationships among groups of people from all parts of the world.

Evolution: How it works
Where does variation come from?
Variation comes from Mutations....