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杂合的红花植株为第一代,让其连续自交,第三代中纯合体占同代个体总数的
A.25% B.50%
C.75% D.100%
A.25% B.50%
C.75% D.100%
杂合的红花植株为第一代,让其连续自交,第四代中纯合体占同代个体总数的( )
A.3/4 B.1/8 C.7/8 D.15/16