@Numpty,
Couple questions since you seem to like to muck up my sci/tech section...
First: Why are you going
backwards up the tree? Canines aren't in the same phyla or family as Homo Sapiens. Not only that, but canines have 39 base pairs compared to our 23 which means they are incompatible from a genetic standpoint.
Secondly: Why are you attempting to make an example using modern species? Modern canines were bred (read: evolved) by humans. Ever wondered why there are so many breeds, even those which are genetically compatible yet physically incompatible? Think of a Saint Bernard female and a Chihuahua male... they can produce viable offspring, but that Chihuahua better learn to climb and hold on tight. Anyway, back to the lesson at hand... using modern species to make an example doesn't work. They are the product, not the components. Moreso, what environmental pressure would bring about the changes you claim?
I don't even have to go into the fact that dogs CAN walk on two legs rather well and that dogs DO have vocal chords. Now, you've got to be wondering "Well if dogs can do the two leg strut, why don't they all the time?"
That's easy:
Ever tried to outrun a dog in the short sprint? Doesn't happen. You'd be dog food before you can say "Jesus, help me!" You can't even outrun a domestic housecat.
So again, what environmental pressure would cause a species to trend away from such a powerful advantage?
At least you get another cigar. You have the
basic idea correct, but that's it. Again, given your scientific knowledge (which apparently doesn't exceed a middle school level), such things warrant celebration.