Genes $A, B$ and $C$ are linked. Genes $A$ and $B$ are more close 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 crosses has occurred between $A$ and $C$ than $A$ and $B$
$I$ and $II$
$II$ and $III$
$III$ and $IV$
$I, II$ and $IV$
For the preparation of genetic maps, the recombination frequencies between genes are additive over short distances but not over long distances due to
When two genes are situated very close to each other in a chromosome
There are three genes $a,\,b,\,c$. Percentage of crossing over between $a$ and $b$ is $20\%$, $b$ and $c$ is $28\%$ and $a$ and $c$ is $8\%$. What is the sequence of genes on chromosome ?
The term “linkage” was coined by
Who clearly proved and define linkage?