Scarlet (S), cream (Cr), and maroon (M) are three genes located on chromosome 3 of Drosophila melanogaster. The distances between each pair of genes is given below. Gene Combination Map Units

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Scarlet (S), cream (Cr), and maroon (M) are three genes located on chromosome 3 of Drosophila melanogaster.

The distances between each pair of genes is given below.

Gene
Combination
Map Units
S and Cr 1.5
Cr and M 9.5
M and S 8.0

The sequence of these genes is
Select one:
a. S Cr M or M Cr S
b. S M Cr or Cr M S
c. Cr S M or M S Cr
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