If the distance between genes on a chromosome is large,then the genes exhibit .....

Primary source of allelic variation is

State the contribution of the following scientists: Thomas Hunt Morgan and Alfred Sturtevant.

Define/Explain: Linkage.

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

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