Ok you are genius, her twin sister is 179.
How about some research before jumping to conclusions...http://genetics.thetech.org/ask/ask142
"Some identical twins can have different heights and weights. This is because height and weight are controlled by what you eat as well your DNA."
"For example, we know that identical twins can be different heights. This means height can't be controlled by your genes alone, because identical twins have the same genes. So height must be part nature and part nurture."