The Mutated Egg

What came first,
The chicken or the egg?
The egg.
 
Evolution is what created you and me,
The plants, the birds, and the bees.
 
Adaptation is the key,
To the hair on our legs,
And the nails on our fingers.
 
An accidental genetic mutation,
Is the key to our nation.
 
Chromosomes passed on,
In exponential notation.
 
One sensation laid and egg,
And it had
A mutation.
 
That egg,
With the mutation,
Was the first chicken,
In our nation.
 
So what came first,
The chicken or the egg?
 
The egg of course,
It had a mutation!