Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

 
In the light of the above statements, choose the correct answer from the options given below:

The recombination frequency between the genes a & c is 5%, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?
1. a, c, b, d
2. a, d, b, c
3. d, b, a, c
4. a, b, c, d

The linkage map of the X-chromosome of fruitfly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end. The recombination frequency between these two genes (y and b) should be:

1. 60%

2. > 50%

3. ≤ 50%

4. 100%

A genetic map is one that:

1. Establishes sites of the genes on a chromosome

2. Establishes the various stages in gene evolution

3. Shows the stages during the cell division

4. Shows the distribution of various species in a region