While reading "What is heredity", and "What are traits", I learned a lot. One thing I learned was why my thumb bends back and is not straight. According to what are traits, it is called hitchikers thumb and I checked my familys' thumbs and they all have it! another thing I learned was that humans have a set of 23 chromosomes each which means all together your parents would have 46 chromosomes. When parents have a child, they give a set to each child. Therefore, the child will have some of the same traits as the parents do.
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