The recombination frequency between the genes a & c is , b & c is
, b & d is
, a & b is
, c & d is
and a & d is
. What will be the sequence of these genes on a linear chromosome?
d,b,a,c
a,b,c,d
a,c,b,d
a,d,b,c
Distance between genes is measured by frequency of recombination.
According to the question,
-Recombination frequency between a & d is highest. This means they are farthest.
-So, option 2 & 3 can be our answer
a__________________b
-Recombination frequency between
a and b = 20%
a and c = 5%
so, a and c are close.
Hence the sequence is
a c b d
Hence, Option (3) is correct.