DNA and heredity

[no idea]

i thought i got some refused thing.can DNA change?if they cannot change, why we dont like as a cave dweller or like a monkey?i mean the body .

[Monique]

You need to make your question more clear, as I cannot understand what you are asking.

[no idea]

when before stone age,the human beings are like as a gorilla. i mean their appearance , using four legs to move ....etc... but now we have got changes . we have a big brain, use two legs to walk . so is it relating the changes of DNA,or others?

[iansmith]

Changes (mutations) in the DNA sequences will give rise to the differences you observe between two species.