Recombination frequencies
Yes that's how it works as far as I know

Because the theory part is pretty straightforward.of the genes are on the Same chromosome, the chance of them being separated in segregation during meiosis is lower

Consider a simple example

---------A--b--------------c----d-e---------------------------------f

Let this be a rope with 6 point a b c d e f
If I were to make a random cut anywhere here, the chance that a,b will get separated is much lower than a,f....because a and f are so far apart that any cut in the middle will ensure them to be separated.
If u look at it again...the chance of d,e to be separated is EXTREMELY low

This is the principle of LINKAGE

Now let me say gene a stands for tall, b for blue and f for bushy...(don't judge the characters)

Now if this is a part of a chromosome on the parent, and meiosis is taking place
We all know that crossing over too is a phenomenon involved here

Now during crossing over.....a and f are bound to get separated for sure, so they will be independently assorted, obeying the law of Mendel

But when we talk about a and b, they may or may not get separated in the various gametes

The closer they are, the lesser chance of them being separated and thereby, higher chance of them occurring in the same gamete and therefore, higher chance of them being expressed in the same offspring(assuming they are dominant)

lets assume we cross blue tall(dominant) with green dwarf(recessive)
As you know f1 will be blue tall(no incomplete or co dominance please)

Now if I take this blue tall and cross it with parental green dwarf

You will have very high number of blue tall and green dwarf(remember, there are alleles of SAME GENE....AND OCCUPY SAME LOCI)(therefore.....high chance of both occurring together in the same gamete)

Therefore the number of recombinant you get will be very low(blue dwarf and green tall........as the chance of these characters entering different gametes is very low)

Therefore we can conclude that higher the number of recombination....higher the chance of the genes segregating which implies a greater distance between the genes)

Therefore a higher recombination frequency implies a higher distance between the 2 linked genes

I hope u have understood the concept and are not struggling to byheart it as a force
Thanks