What was the phenotypic ratio obtained in the experiment on linkage and recombination performed in Lathyrus odoratus (Sweet Pea)?

In the construction of chromosome maps,the evidence is derived mainly from

Assertion: In case of incomplete linkage,linked genes show new combinations along with parental combinations.
Reason: In case of incomplete linkage,linked genes are separated by crossing over.

The experiment shown in the given figure has been carried out by Morgan to show the phenomenon of linkage and recombination. If in cross $I$,genes are tightly linked and in cross $II$,genes are loosely linked,then what will be the percentage of recombinants produced in cross $I$ and cross $II$ respectively?

The lack of independent assortment of two genes $A$ and $B$ in the fruit fly $Drosophila$ is due to:

There are three genes $a, b, c$. The percentage of crossing over between $a$ and $b$ is $20\%$,between $b$ and $c$ is $28\%$,and between $a$ and $c$ is $8\%$. What is the sequence of genes on the chromosome?