Midthun, Joseph <br/><br/>
Traits and heredity 

 - 32 pages :  color illustrations 
 - Building blocks of science .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9780716628279 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Juvenile literature<br/>Genes--Juvenile literature
<br/><br/><label>Dewey Class. No.: </label>503