When two genes are situated very close to each other in a chromosome
The percentage of crossing over between them is very high
Hardly any crossing over is detected
No crossing over can take place between them
Only double cross overs can take place between them
$DNA$ gyrase, the enzyme that participates in the process of $DNA$ replication is a type of
$A$ : Nutritional mutant strain of pink mould is auxotroph.
$R$ : It is not able to prepare its own metabolites from the raw materials obtained from outside
The theory of jumping genes was propounded by or Noble prize for the concept of jumping gene was given to
In a mutational event, when adenine is replaced by guanine, it is a case of