In Mendelism, linkage was not observed due to
Mutation
Independent assortment
Synapsis
Crossing over
$A$ : Crossing over is exchange of genetic material between non-homologous chromosomes.
$R$ : It produces new linkages.
Frequency of crossing over in a chromosome is an index of
Mendel observed that some characters did not assort independently. Later researchers found it to be due to
In order to calculate map distance of genes on a chromosome, one must know the
The term “linkage” was coined by