tetrad 

  1. 名詞
四個, 四分染色體, 四個一組

    
                        
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例句

                

                    
    
                                                    
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                                The most recent tetrad fell in 2003-2004.                            
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  2. 
                                The Pythagorean oath by the Tetrad is well known.                            
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  3. 
                                Guanine tetrad structure, first proposed for 3' GMP fibres.                            
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                                The element reverses the orientation of a vierbein ( tetrad ).                            
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  5. 
                                Define the terms bivalent, tetrad , chiasmata, and crossing over.                            
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