<span>Chromosomes, found in the cell nucleus, contain many genes. A gene is a section of </span>DNA<span>, which carries coding for a particular protein. Different genes control the development of different characteristics of an organism. Many genes are needed to carry all the genetic information for a whole organism.</span>
B is the answer. I repeat B is the answer.
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Answer:
C
Explanation:
If you have more than one variable then you wont know which variable caused the change. Hope this helped, if it did give it a thanks or whatever.
