This gene linkage map shows the relative positions of allelic characteristics on the second Drosophila chromosome. The alleles on the chromosome form a linkage group due to their tendency to form together into gametes. The distance between the genes (map units) are equal to the percentage of crossing-over events that occurs between different alleles. This diagram is also based on the findings of Thomas Hunt Morgan in his Drosophila cross.Mader, Sylvia (2007)       Biology Ninth Edition, Category:New York:  McGraw-Hill, p. 209  ISBN:  978-0-07-325839-3.
Own work
Twaanders17