Ah finally my experience in writing research papers pay off...I knew this day would come. Simply put some organisms clone better than others. In plants, we have it down. No variation. In animals some factors like size, health concerns, and surprisingly athletic ability seem to be consistent. Other factors like cognitive intelligence, temperament and even looks are not consistent.
One of the main working theories is that a mammal's brain tends to do a lot of development outside of the womb. Think about a human baby. A baby could have genius gene (just an example not real) but if there isn't enough cognitive stimulation early on in that baby's development...you will see developmental delays in that child's cognitive ability.
One of the main working theories is that a mammal's brain tends to do a lot of development outside of the womb. Think about a human baby. A baby could have genius gene (just an example not real) but if there isn't enough cognitive stimulation early on in that baby's development...you will see developmental delays in that child's cognitive ability.