下列叙述中,正确的是(     ) A.纯合子自交后代是纯合子   

下列叙述中,正确的是(    

A纯合子自交后代是纯合子                B杂合子自交后代是杂合子

 C两种纯合子杂交,其后代仍是纯合子      D杂合子杂交的后代全是杂合子

答案

A

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