Total Posts:7|Showing Posts:1-7
Jump to topic:

DNA Human/ Animals

Fruitytree
Posts: 2,176
Add as Friend
Challenge to a Debate
Send a Message
4/22/2013 4:53:19 PM
Posted: 4 years ago
Hi,

Can people from science planet tell me what are the percentage of animal DNA resemblance with Human DNA, not just the apes but Rats, Pigs, cows , whales, birds, what this percentage means and how accurate is it.

Thank you
Wnope
Posts: 6,924
Add as Friend
Challenge to a Debate
Send a Message
4/22/2013 5:18:05 PM
Posted: 4 years ago
Well, there's the old school means of comparison and more modern techniques.

Back in the day, DNA similarity was calculated by basically heating up the different DNA strands so they separate, mixing them, and see what parts "pair up." If they pair up, the reasoning is, they must be identical is nucleotide composition.

So, if you do this process with chimps and humans, you might find that only 2% of the DNA won't pair up. From this, you'd say they share 95% of their DNA.

The next generation used the same processes we used to match DNA between suspects and blood samples, fathers and possible sons, etc. You throw in some proteins to each sample and they will splice up similar sequences (say, if they find ATTGAAC they'll cut the genome up).
If you line up the spliced bits to see how they spread out.

http://en.wikipedia.org...

These days, the means of comparing species DNA is even more specific than that. There are multiple techniques, and I probably don't even know all of them.

http://en.wikipedia.org...
https://en.wikipedia.org...
http://en.wikipedia.org...
https://en.wikipedia.org...
https://en.wikipedia.org...
https://en.wikipedia.org...
Fruitytree
Posts: 2,176
Add as Friend
Challenge to a Debate
Send a Message
4/22/2013 5:50:19 PM
Posted: 4 years ago
I didn't find persentage for other then Chimps, but it seems DNA similarity percentage is not th best way to conclude we and the Chimps are cousins ?
APB
Posts: 267
Add as Friend
Challenge to a Debate
Send a Message
4/22/2013 6:05:21 PM
Posted: 4 years ago
Nowadays you just map the whole genome and run it through a computer, which analyses the sequences and spits out a whole heap of data. At least, I'd be surprised if it wasn't like that.
Wnope
Posts: 6,924
Add as Friend
Challenge to a Debate
Send a Message
4/22/2013 6:40:17 PM
Posted: 4 years ago
At 4/22/2013 6:05:21 PM, APB wrote:
Nowadays you just map the whole genome and run it through a computer, which analyses the sequences and spits out a whole heap of data. At least, I'd be surprised if it wasn't like that.

It's a matter of cost and computing power. When the human genome project started, the technology was so slow an expensive that it really wasn't worth it to run full sequences.

Near the end of the project, whole genome sequencing became so fast and cheap that it is practical in many cases.

Usually, however, what happens is they take statistical samples and compare them instead of the entire genome.