試題詳解

21. If the recombination frequency between gene A and B is 10 out of 100 offspring, gene A and C is 30 out of 100 offspring, and gene B and C is 40 out of 100 offspring, what is the location of these genes in relation to each other on a chromosome?
(A) CAB
(B) BAC
(C) ABC
(D) CBA
(E) either CAB or BAC