Which of the following is not part of genetic "linkage mapping"?
a. calculating recombination frequencies using a testcross
b. assuming that recombination frequency is proportional to the distance
between two linked genes
c. finding and studying alternative (e. g., mutant) phenotypes of a character
d. using information on dna sequences
e. studying characters two at a time

The correct answer is option D.

Explanation:

Linkage mapping is the mapping process in which the genes present on the chromosomes are mapped on the base of their linkage. The linkage mapping helps in calculating how frequent recombination occurs using testcross.

Linkage mapping does not utilize the information that is on DNA sequences, however, it helps in assuming the distance of two linked genes is proportional of the recombination frequency. By the recombination, frequency mutations can be found and study.

Thus, the correct answer is option D.

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