26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth.
27 So God created man in his own image, in the image of God created he him; male and female created he them.
God created two versions of man: male and female. He created them in His own image.
It is true that even identical twins are different. Every human being has certain features about him or her that make her different than anyone else on earth. Life circumstances (weather, stress, scars, even your personality shapes your physical features over time. This is how we tell each other apart. But, there is always someone who says, "You look just like your mom (or dad)!", which, though you may favor them -- due to the DNA that was contributed to your gene pool -- you do NOT look JUST LIKE THEM.
In the same way, you were created in the image of God. You may not look exactly like God, but you were created to shine like Him. You were created to love like Him. You were created to be productive and creative. You were created to endure. You were created to be righteous! You were created to be godly! There is nothing on this earth that we could not do if we set our mind to it if we maintain our "godliness". This does not mean we are a God. It means that we are God's.
Finally, God ALSO created us to rule over the earth and all that is in it. We were to "have dominion" over everything. There is not an animal or plant on this earth that we cannot use for something. God does not make anything that is useless, including YOU.