In the fruit fly $Drosophila$,the lack of independent assortment between genes $A$ and $B$ is due to .....

Genes $A, B$,and $C$ are linked. Genes $A$ and $B$ are closer than $A$ and $C$. Find out the correct option for the given statements:
$I.$ $A$ might be before $B$ and $C$
$II.$ $B$ might be between $A$ and $C$
$III.$ $C$ might be between $A$ and $B$
$IV.$ More crossovers have occurred between $A$ and $C$ than $A$ and $B$.

Which of the following represents the frequency of recombination between two genes that are inversely proportional to the strength of linkage?

The map distance between genes $A$ and $B$ is $3$ units,between $B$ and $C$ $10$ units,and between $C$ and $A$ $7$ units. The order of the genes in a linkage map constructed on the above data would be:

The tendency of genes to remain together during the process of inheritance is known as

In $Neurospora$,the arrangement of $8$ ascospores produced is $2a : 4a : 2a$. This indicates: